…#2630)

* chore: Update generation configuration at Fri Sep  6 02:20:36 UTC 2024

* chore: Update generation configuration at Sat Sep  7 02:18:51 UTC 2024

* chore: Update generation configuration at Sun Sep  8 02:24:19 UTC 2024

This is part one to resolve b/330980553, this pr allows read and parse
api versioning from proto to service model.

Changes included in this pr:
- rename current apiVersion to packageVersion. This packageVersion is
parsed from package name and exposed in #1075. It was intended to be
used in Spring codegen, but not actually used. It is used in generating
sample region tags (see details
[9ec3531](googleapis/sdk-platform-java@9ec3531))
- exposing apiVersion from Service model.
- Parser.java to parse apiVersion from `ClientProto.apiVersion` to
service.

#2671)

This is part 2, following changes in
googleapis/sdk-platform-java#2630

Changes in this pr:
- ApiClientHeaderProvider: add key and token setter for api version.
- AbstractServiceStubSettingsClassComposer: add logic to set this header
when api-version is present (not null or empty)
- Unit and golden tests to reflect above changes. (This includeds a few
new golden files created for tests based on the dedicated proto created
in #2630)

This pr does not include gapic-showcased testing for now.
---
manual tested with
[gapic-showcase](https://github.com/googleapis/gapic-showcase) v0.33.0

steps: 
- Use gapic-showcase v0.33.0 (which includes update in 1484)
- use `gapic-showcase run -v` which prints the request header
- From showcase folder, run `mvn verify -P enable-integration-tests
-Dit.test=ITAutoPopulatedFields.java -pl=gapic-showcase`

Printed header in manual testing
Grpc
```
2024/04/16 10:26:41 Received Unary Request for Method: /google.showcase.v1beta1.Echo/Echo
2024/04/16 10:26:41     Request headers:
2024/04/16 10:26:41       grpc-accept-encoding: gzip
2024/04/16 10:26:41       content-type: application/grpc
2024/04/16 10:26:41       x-goog-api-version: v1_20240408
2024/04/16 10:26:41       :authority: localhost:7469
2024/04/16 10:26:41       user-agent: grpc-java-netty/1.62.2
2024/04/16 10:26:41       x-goog-api-client: gl-java/17.0.7__Eclipse-Adoptium__Temurin-17.0.7-7 gapic/0.0.1-SNAPSHOT gax/2.46.2-SNAPSHOT grpc/1.62.2
2024/04/16 10:26:41     Request:  error:{code:2}  request_id:"1e26ee16-ed07-4eeb-be0e-49b769678779"  other_request_id:"40883e5d-3b20-4add-854c-9808bd009260"
2024/04/16 10:26:41     Returning Error: rpc error: code = Unknown desc = 
```
Httpjson
```
2024/04/16 10:26:41 Received POST request matching '/v1beta1/echo:echo': "/v1beta1/echo:echo"                                                               
2024/04/16 10:26:41   urlPathParams (expect 0, have 0): map[]                 
2024/04/16 10:26:41   urlRequestHeaders:                                                                                                                    
    User-Agent: "Google-HTTP-Java-Client/1.44.1 (gzip)"                                                                                                     
    Content-Type: "application/json; charset=utf-8"                           
    Connection: "keep-alive"                                                                                                                                
    Accept-Encoding: "gzip"                                                   
    X-Goog-Api-Client: "gl-java/17.0.7__Eclipse-Adoptium__Temurin-17.0.7-7 gapic/0.0.1-SNAPSHOT gax/2.46.2-SNAPSHOT rest/"                                  
    X-Goog-Api-Version: "v1_20240408"                                                                                                                       
    Accept: "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"            
    Content-Length: "129"                                                     
2024/04/16 10:26:41   request: {                                                                                                                            
  "error":  {                                                                                                                                               
    "code":  500,                                                                                                                                           
    "message":  "",                                                                                                                                         
    "details":  []                                                            
  },                                                                                                                                                        
  "severity":  "UNNECESSARY",                                                                                                                               
  "header":  "",                                                                                                                                            
  "otherHeader":  "",                                                         
  "requestId":  "e690a84b-176d-421e-9e5d-ba752f68fec8",                       
  "otherRequestId":  "47e0fbde-056a-43ae-bba6-8b6770d861f7"                   
}    
```

🤖 I have created a release *beep* *boop*
---


<details><summary>2.40.0</summary>

##
[2.40.0](googleapis/sdk-platform-java@v2.39.0...v2.40.0)
(2024-05-02)


### Features

* [common-protos] add `Weight` to common types for Shopping APIs to be
used for accounts bundle
([#2699](googleapis/sdk-platform-java#2699))
([90a28ef](googleapis/sdk-platform-java@90a28ef))
* add a CLI tool to validate generation configuration
([#2691](googleapis/sdk-platform-java#2691))
([f52f8cc](googleapis/sdk-platform-java@f52f8cc))
* Parser to consume the api-versioning value from proto
([#2630](googleapis/sdk-platform-java#2630))
([c112b37](googleapis/sdk-platform-java@c112b37))
* Update Gapic generator and Gax to emit api-versioning via header
([#2671](googleapis/sdk-platform-java#2671))
([cb5ada0](googleapis/sdk-platform-java@cb5ada0))


### Bug Fixes

* change folder prefix for adding headers
([#2688](googleapis/sdk-platform-java#2688))
([ab5ba1d](googleapis/sdk-platform-java@ab5ba1d))
* Log HttpJson's async thread pool core size
([#2697](googleapis/sdk-platform-java#2697))
([31038d1](googleapis/sdk-platform-java@31038d1))
* replace `cfg = "host"` with `cfg = "exec"`
([#2637](googleapis/sdk-platform-java#2637))
([fd12e0f](googleapis/sdk-platform-java@fd12e0f))
* Return resolved endpoint from StubSettings' Builder
([#2715](googleapis/sdk-platform-java#2715))
([6139a73](googleapis/sdk-platform-java@6139a73))


### Dependencies

* Make opentelemetry-api an optional dependency.
([#2681](googleapis/sdk-platform-java#2681))
([2239c8c](googleapis/sdk-platform-java@2239c8c))
* update dependency absl-py to v2.1.0
([#2659](googleapis/sdk-platform-java#2659))
([b2b7738](googleapis/sdk-platform-java@b2b7738))
* update dependency gitpython to v3.1.43
([#2656](googleapis/sdk-platform-java#2656))
([6d273ad](googleapis/sdk-platform-java@6d273ad))
* update dependency lxml to v5.2.1
([#2661](googleapis/sdk-platform-java#2661))
([7a34168](googleapis/sdk-platform-java@7a34168))
* update dependency net.bytebuddy:byte-buddy to v1.14.14
([#2703](googleapis/sdk-platform-java#2703))
([72b0441](googleapis/sdk-platform-java@72b0441))
* update dependency typing to v3.10.0.0
([#2663](googleapis/sdk-platform-java#2663))
([4c64e98](googleapis/sdk-platform-java@4c64e98))
* update gapic-showcase to v0.33.0
([#2653](googleapis/sdk-platform-java#2653))
([5c12155](googleapis/sdk-platform-java@5c12155))


### Documentation

* Add contributing guidelines to PR and issue templates
([#2682](googleapis/sdk-platform-java#2682))
([82f5ce8](googleapis/sdk-platform-java@82f5ce8))
</details>

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

This pr updates gapic-showcase version to 0.35.0 and adds showcase tests
to verify behavior of api version headers being emitted (changes in
#2630 and #2671).

…2630)

Change-Id: I10bfd50174fe2c790aa4a10086a3b14017ba6156

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:
- [ ] Make sure to open an issue as a [bug/issue](https://togithub.com/googleapis/java-bigtable/issues/new/choose) before writing your code!  That way we can discuss the change, evaluate designs, and agree on the general idea
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- [ ] Code coverage does not decrease (if any source code was changed)
- [ ] Appropriate docs were updated (if necessary)
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- [ ] All new data plane features have a completed end to end testing plan

Fixes #<issue_number_goes_here> ☕️

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