chore: [Many APIs] Update the Java code generator (gapic-generator-java) to 2.23.1 (#9658)

* chore: Update the Java code generator (gapic-generator-java) to 2.23.1

PiperOrigin-RevId: 549674836

Source-Link: googleapis/googleapis@3b7a121

Source-Link: https://github.com/googleapis/googleapis-gen/commit/2d643a4eff8c8ef4c9d5a2e59d2a0ca7c991eab6
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* chore: Ignore flaky test

* chore: Add to owlbot preserve regex

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Lawrence Qiu <[email protected]>

Author: gcf-owl-bot[bot]

java-bare-metal-solution/README.md

@@ -23,7 +23,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file:
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>26.16.0</version>
+      <version>26.19.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -201,7 +201,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/google-cloud-java/java11.html
 [stability-image]: https://img.shields.io/badge/stability-preview-yellow
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-bare-metal-solution.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-bare-metal-solution/0.19.0
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-bare-metal-solution/0.21.0
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles