Removes client-side `checkArgument` and `checkNotNull` validations from the constructors of `TableId`, `DatasetId`, `RoutineId`, `ModelId`, and `ConnectionProperty`.

This change makes the client library more robust by preventing crashes when the server sends a response with unexpected null or empty values in these fields.

Removes client-side `checkArgument` and `checkNotNull` validations from the constructors of `TableId`, `DatasetId`, `RoutineId`, `ModelId`, and `ConnectionProperty`.

This change makes the client library more robust by preventing crashes when the server sends a response with unexpected null or empty values in these fields.

Protobuf-java
[v4.33.x](https://github.com/protocolbuffers/protobuf/releases/tag/v33.0)
restored gen code compatibility to 3.0.0. Upgrade protobuf runtime and
gen code to 4.33.x should have minimum risks now. See

[go/cloud-java:protobuf-4.x-upgrade](http://goto.google.com/cloud-java:protobuf-4.x-upgrade)
for details.

---------

Co-authored-by: cloud-java-bot <cloud-java-bot@google.com>
Co-authored-by: Diego Marquez <diegomarquezp@google.com>

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


<details><summary>2.66.0</summary>

##
[2.66.0](googleapis/sdk-platform-java@v2.65.1...v2.66.0)
(2026-01-23)


### Features

* Upgrade protobuf runtime and gen code to 4.33.x
([#4000](googleapis/sdk-platform-java#4000))
([#4074](googleapis/sdk-platform-java#4074))
([fe9fdf2](googleapis/sdk-platform-java@fe9fdf2))


### Dependencies

* Downgrade opentelemetry to 1.51.0
([#4075](googleapis/sdk-platform-java#4075))
([b594cef](googleapis/sdk-platform-java@b594cef))
* update auth library to 1.42.0
([#4087](googleapis/sdk-platform-java#4087))
([62e35e5](googleapis/sdk-platform-java@62e35e5))
* update googleapis/java-cloud-bom digest to ef3656d
([#3630](googleapis/sdk-platform-java#3630))
([0db9a4c](googleapis/sdk-platform-java@0db9a4c))
* update http-client to 2.1.0
([#4086](googleapis/sdk-platform-java#4086))
([c623677](googleapis/sdk-platform-java@c623677))
</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>

The snapshot timestamp is the timestamp at which all the reads in a
transaction ran when using repeatable read isolation. The method is
only intended to be used for internal testing purposes, so the snapshot
timestamp will be `null` if attempted to be used externally.