* feat(spanner): mTLS setup for spanner external host clients

* feat(spanner): mTLS setup for spanner clients

* feat(spanner): removing isExternalHost as a data member of the builder class

* feat(spanner): added spanner options method usePlainText for abstraction

* feat(spanner): replaced setting channel provider with setting channel configurator

* feat(spanner): added cert and key to hashCode and equals of SpannerPoolKey

---------

Co-authored-by: rahul2393 <[email protected]>

…#3578)

Co-authored-by: rahul2393 <[email protected]>

* feat: add LockHint feature

* fix typo

* updated logic to make sure lockHint get propagated only for ReadWriteTransaction

* add warning message when using lock hint with unsupported transaction

…#3587)

* chore: Update generation configuration at Wed Jan  8 17:05:33 UTC 2025

* chore: Update generation configuration at Thu Jan  9 02:35:11 UTC 2025

…ring-v3 to v3.56.0 (#3563)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.api.grpc:proto-google-cloud-monitoring-v3](https://redirect.github.com/googleapis/google-cloud-java) | `3.55.0` -> `3.56.0` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.api.grpc:proto-google-cloud-monitoring-v3/3.56.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.google.api.grpc:proto-google-cloud-monitoring-v3/3.56.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.google.api.grpc:proto-google-cloud-monitoring-v3/3.55.0/3.56.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.api.grpc:proto-google-cloud-monitoring-v3/3.55.0/3.56.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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…v3.41.1 (#3589)

…ring-v3 to v3.57.0 (#3592)

…to v6.84.0 (#3491)

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


### Updating meta-information for bleeding-edge SNAPSHOT release.

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

… to v0.33.0 (#3455)

* chore(main): release 6.85.0

* chore: generate libraries at Fri Jan 10 10:30:23 UTC 2025

---------

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