Rebase PR #99 and fix up

I have a pending request to the GCS team asking if this is a reasonable thing to have exposed, however based on our conversations in #99 and #224 it seems that it needs to exist regardless (if we don't provide it, people will just do this on their own).

That said, we need to be clear about what's happening under the hood in the short part of the docstring. If someone is frequently "renaming" 5TB objects (that's the maximum size currently), this could actually change their bill a lot and make the GCS API do some ridiculous amounts of work. For small objects this shouldn't really be a problem.

I have a pending request to the GCS team asking if this is a reasonable thing to have exposed, however based on our conversations in googleapis#99 and googleapis#224 it seems that it needs to exist regardless (if we don't provide it, people will just do this on their own).

That said, we need to be clear about what's happening under the hood in the short part of the docstring. If someone is frequently "renaming" 5TB objects (that's the maximum size currently), this could actually change their bill a lot and make the GCS API do some ridiculous amounts of work. For small objects this shouldn't really be a problem.

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…224)

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…urce message (#224)

* feat: make reservation_name parameter generally visible in QueuedResource message

---
feat: add DeleteQueuedResource experiment

---
docs(v2alpha1): minor formatting to the description for `queued_resource_id`

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* fix(deps): allow protobuf 3.19.5

* explicitly exclude protobuf 4.21.0

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…#224)

* test: cleanup capacity commitments leftover from failed samples tests

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* try session scope

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| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [backoff](https://togithub.com/litl/backoff) | `==1.11.0` -> `==1.11.1` | [![age](https://badges.renovateapi.com/packages/pypi/backoff/1.11.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/backoff/1.11.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/backoff/1.11.1/compatibility-slim/1.11.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/backoff/1.11.1/confidence-slim/1.11.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>litl/backoff</summary>

### [`v1.11.1`](https://togithub.com/litl/backoff/blob/master/CHANGELOG.md#v1111-2021-07-14)

[Compare Source](https://togithub.com/litl/backoff/compare/v1.11.0...v1.11.1)

##### Changed

-   Update **version** in backoff module

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* chore: use gapic-generator-python 0.63.4

chore: fix snippet region tag format
chore: fix docstring code block formatting
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….3 (#224)

…ic enums (#224)

* feat: enable "rest" transport in Python for services supporting numeric enums

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-org-policy](https://togithub.com/googleapis/python-org-policy) | `>=0.1.2, <0.4.0` -> `>=0.1.2, <2.0.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-org-policy/1.0.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-org-policy/1.0.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-org-policy/1.0.0/compatibility-slim/0.3.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-org-policy/1.0.0/confidence-slim/0.3.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/python-org-policy</summary>

### [`v1.0.0`](https://togithub.com/googleapis/python-org-policy/blob/master/CHANGELOG.md#&#8203;100-httpswwwgithubcomgoogleapispython-org-policycomparev030v100-2021-07-01)

[Compare Source](https://togithub.com/googleapis/python-org-policy/compare/v0.3.0...v1.0.0)

##### Features

-   add always_use_jwt_access ([#&#8203;59](https://www.github.com/googleapis/python-org-policy/issues/59)) ([6acf334](https://www.github.com/googleapis/python-org-policy/commit/6acf334ca0c306603b49ab64694647985b04e83b))
-   bump release level to production/stable ([#&#8203;50](https://www.github.com/googleapis/python-org-policy/issues/50)) ([2b1da9e](https://www.github.com/googleapis/python-org-policy/commit/2b1da9e03aa82330b0461c78abee2fa75390d238))

##### Bug Fixes

-   disable always_use_jwt_access ([#&#8203;62](https://www.github.com/googleapis/python-org-policy/issues/62)) ([b6bf93c](https://www.github.com/googleapis/python-org-policy/commit/b6bf93c535dee1822d3b111a8e96ca6d4d30ba55))

##### Documentation

-   omit mention of Python 2.7 in 'CONTRIBUTING.rst' ([#&#8203;1127](https://www.github.com/googleapis/python-org-policy/issues/1127)) ([#&#8203;56](https://www.github.com/googleapis/python-org-policy/issues/56)) ([540f601](https://www.github.com/googleapis/python-org-policy/commit/540f6018e9631664c0fda97ca1d0db90ab5783fd)), closes [#&#8203;1126](https://www.github.com/googleapis/python-org-policy/issues/1126)

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- [ ] Regenerate this pull request now.

fix: improper types in pagers generation
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The print statement in the print_get_metadata_response was printing the custom definition status of a dimension when it was supposed to be printing information about the custom definition status of a metric

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…p/templates/python_library/.kokoro (#224)

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* docs: pandas DataFrame samples are more standalone

* fix region tag

* fix region tag

* remove unused imports

* blacken

* remove session from call to rows/to_dataframe

🤖 I have created a release \*beep\* \*boop\*
---
### [2.6.1](https://www.github.com/googleapis/python-bigquery-storage/compare/v2.6.0...v2.6.1) (2021-07-20)


### Bug Fixes

* **deps:** pin 'google-{api,cloud}-core', 'google-auth' to allow 2.x versions ([#240](https://www.github.com/googleapis/python-bigquery-storage/issues/240)) ([8f848e1](https://www.github.com/googleapis/python-bigquery-storage/commit/8f848e18379085160492cdd2d12dc8de50a46c8e))


### Documentation

* pandas DataFrame samples are more standalone ([#224](https://www.github.com/googleapis/python-bigquery-storage/issues/224)) ([4026997](https://www.github.com/googleapis/python-bigquery-storage/commit/4026997d7a286b63ed2b969c0bd49de59635326d))
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* docs: pandas DataFrame samples are more standalone

* fix region tag

* fix region tag

* remove unused imports

* blacken

* remove session from call to rows/to_dataframe

🤖 I have created a release \*beep\* \*boop\*
---
### [2.6.1](https://www.github.com/googleapis/python-bigquery-storage/compare/v2.6.0...v2.6.1) (2021-07-20)


### Bug Fixes

* **deps:** pin 'google-{api,cloud}-core', 'google-auth' to allow 2.x versions ([#240](https://www.github.com/googleapis/python-bigquery-storage/issues/240)) ([8f848e1](https://www.github.com/googleapis/python-bigquery-storage/commit/8f848e18379085160492cdd2d12dc8de50a46c8e))


### Documentation

* pandas DataFrame samples are more standalone ([#224](https://www.github.com/googleapis/python-bigquery-storage/issues/224)) ([4026997](https://www.github.com/googleapis/python-bigquery-storage/commit/4026997d7a286b63ed2b969c0bd49de59635326d))
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* parse all datetime types

* typo

* new black version

* I tihnk we're doing similar things twice

* better type tests

* check nulls before assigning type

* add env to gitignore

* remove old code

* handle float and int columns re nulls

* nullable int columns as floats (separate issue)

* Chesterton's Fence

* try falling back to standard black check

* exclude nox

* changelog

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