…yle-plugin to v3.6.0 (#3428)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [org.apache.maven.plugins:maven-checkstyle-plugin](https://maven.apache.org/plugins/) | `3.5.0` -> `3.6.0` | [![age](https://developer.mend.io/api/mc/badges/age/maven/org.apache.maven.plugins:maven-checkstyle-plugin/3.6.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/org.apache.maven.plugins:maven-checkstyle-plugin/3.6.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/org.apache.maven.plugins:maven-checkstyle-plugin/3.5.0/3.6.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/org.apache.maven.plugins:maven-checkstyle-plugin/3.5.0/3.6.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/googleapis/java-spanner).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4xMjAuMSIsInVwZGF0ZWRJblZlciI6IjM4LjEyMC4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

…3423)

* chore(spanner): support Mutation only case FOR R/W mux

* chore(spanner): unit test for selecting random mutation

* chore(spanner): support precommit token for mutation only in mock spanner and mock spanner tests

* chore(spanner): commit for debuging flakkiness

* chore(spanner): debug flakiness

* chore(spanner): update logic

* chore(spanner): lint fix

* chore(spanner): review comments

* chore(spanner): handle empty insert mutation case

* chore(spanner): add helper methods

* chore(spanner): review comments

#3432)

* chore: Update generation configuration at Sat Oct 26 02:22:40 UTC 2024

* chore: Update generation configuration at Sun Oct 27 02:27:19 UTC 2024

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

* chore(main): release 6.80.1

* chore: generate libraries at Mon Oct 28 09:25:29 UTC 2024

---------

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