chore: setup declarative configuration for branch protection and release-please (#3091)

fixes #3085

This change should migrate all required tests from "settings" tab to
`.github/sync-repo-settings.yaml`. Also setting up release-please
branches for lts.

Sync-repo-settings.yaml is updated referencing [this
guide](https://github.com/googleapis/repo-automation-bots/tree/main/packages/sync-repo-settings),
and settings in google-cloud-java
[here](https://github.com/googleapis/google-cloud-java/blob/main/.github/sync-repo-settings.yaml).

Release-please.yaml is updated referencing
[this](https://github.com/googleapis/repo-automation-bots/tree/main/packages/release-please#configuration)
and google-cloud-java settings
[here](https://github.com/googleapis/google-cloud-java/blob/main/.github/release-please.yml).


**Questions to reviewers:**
- Is permission rules with "yoshi-" teams still accurate? Do we prefer
java specific teams as admin/push?
- This update will override configurations in “Settings” for protected
branches, I do not have access to this tab. Can you please double check
I am not missing anything AND/OR give me access to it?

Author: zhumin8

.github/release-please.yml

@@ -3,4 +3,13 @@ bumpMinorPreMajor: true
 handleGHRelease: true
 primaryBranch: main
 manifest: true
-extraFiles: ["WORKSPACE", ".cloudbuild/graalvm/cloudbuild.yaml", ".cloudbuild/graalvm/cloudbuild-test-a.yaml", ".cloudbuild/graalvm/cloudbuild-test-b.yaml"]
+extraFiles: ["WORKSPACE", ".cloudbuild/graalvm/cloudbuild.yaml", ".cloudbuild/graalvm/cloudbuild-test-a.yaml", ".cloudbuild/graalvm/cloudbuild-test-b.yaml", ".cloudbuild/library_generation/cloudbuild-library-generation-release.yaml", "generation_config.yaml"]
+branches:
+  - branch: 2.23.x
+    releaseType: java-backport
+    manifest: true
+    handleGHRelease: true
+  - branch: 2.40.x
+    releaseType: java-backport
+    manifest: true
+    handleGHRelease: true

.github/sync-repo-settings.yaml

@@ -2,37 +2,79 @@ rebaseMergeAllowed: true
 squashMergeAllowed: true
 mergeCommitAllowed: false
 branchProtectionRules:
-- pattern: main
-  isAdminEnforced: true
-  requiredApprovingReviewCount: 1
-  requiresCodeOwnerReviews: true
-  requiresStrictStatusChecks: false
-  requiredStatusCheckContexts:
-  - build(8) except for gapic-generator-java
-  - build(8) for gapic-generator-java
-  - build (11)
-  - build (17)
-  - cla/google
-  - compatibility
-  - graalvm-presubmit-sdk-platform-java-a (java-graalvm-ci-prod)
-  - graalvm-presubmit-sdk-platform-java-b (java-graalvm-ci-prod)
-  - graalvm-presubmit-sdk-platform-java-a-downstream-kms (java-graalvm-ci-prod)
-  - graalvm-presubmit-sdk-platform-java-b-downstream-kms (java-graalvm-ci-prod)
-  - graalvm-presubmit-sdk-platform-java-a-downstream-kmsinventory (java-graalvm-ci-prod)
-  - graalvm-presubmit-sdk-platform-java-b-downstream-kmsinventory (java-graalvm-ci-prod)
-  - library_generation
-  - library-generation-integration-test (java-hermetic-build-prod)
-  - library-generation-lint-python
-  - library-generation-lint-shell
-  - library-generation-unit-tests
-  - lint
-  - should-run-library-generation-tests
-  - showcase (11)
-  - showcase (17)
+  - pattern: main
+    isAdminEnforced: true
+    requiredApprovingReviewCount: 1
+    requiresCodeOwnerReviews: true
+    requiresStrictStatusChecks: false
+    requiredStatusCheckContexts:
+      - build(8) except for gapic-generator-java
+      - build(8) for gapic-generator-java
+      - build (11)
+      - build (17)
+      - cla/google
+      - compatibility
+      - graalvm-presubmit-sdk-platform-java-a (java-graalvm-ci-prod)
+      - graalvm-presubmit-sdk-platform-java-b (java-graalvm-ci-prod)
+      - graalvm-presubmit-sdk-platform-java-a-downstream-kms (java-graalvm-ci-prod)
+      - graalvm-presubmit-sdk-platform-java-b-downstream-kms (java-graalvm-ci-prod)
+      - graalvm-presubmit-sdk-platform-java-a-downstream-kmsinventory (java-graalvm-ci-prod)
+      - graalvm-presubmit-sdk-platform-java-b-downstream-kmsinventory (java-graalvm-ci-prod)
+      - library_generation
+      - library-generation-integration-test (java-hermetic-build-prod)
+      - library-generation-lint-python
+      - library-generation-lint-shell
+      - library-generation-unit-tests
+      - lint
+      - should-run-library-generation-tests
+      - showcase (11)
+      - showcase (17)
+  - pattern: 2.23.x
+    isAdminEnforced: true
+    requiredApprovingReviewCount: 1
+    requiresCodeOwnerReviews: true
+    requiresStrictStatusChecks: false
+    requiredStatusCheckContexts:
+      - build (8) except for gapic-generator-java
+      - build (8) for gapic-generator-java
+      - build (11)
+      - build (17)
+      - showcase (11)
+      - showcase (17)
+      - compatibility
+      - cla/google
+      - lint
+      - graalvm-presubmit-sdk-platform-java-a (cloud-devrel-kokoro-resources)
+      - graalvm-presubmit-sdk-platform-java-b (cloud-devrel-kokoro-resources)
+      - library-generation-integration-tests
+      - library-generation-lint-shell
+      - library-generation-lint-python
+      - should-run-library-generation-tests
+  - pattern: 2.40.x
+    isAdminEnforced: true
+    requiredApprovingReviewCount: 1
+    requiresCodeOwnerReviews: true
+    requiresStrictStatusChecks: false
+    requiredStatusCheckContexts:
+      - build (8) except for gapic-generator-java
+      - build (8) for gapic-generator-java
+      - build (11)
+      - build (17)
+      - build(21) except self-service clients
+      - showcase (11)
+      - showcase (17)
+      - showcase-native
+      - compatibility
+      - cla/google
+      - lint
+      - graalvm-presubmit-sdk-platform-java-a (cloud-devrel-kokoro-resources)
+      - graalvm-presubmit-sdk-platform-java-b (cloud-devrel-kokoro-resources)
+      - library-generation-integration-tests
+      - library-generation-lint-shell
+      - library-generation-lint-python
+      - should-run-library-generation-tests
 permissionRules:
-- team: yoshi-admins
-  permission: admin
-- team: yoshi-java-admins
-  permission: admin
-- team: yoshi-java
-  permission: push
+  - team: cloud-java-team-teamsync
+    permission: admin
+  - team: cloud-java-bot
+    permission: write