chore: create 2.22.x branch (#2082)

Author: BenWhitehead

.github/release-please.yml

@@ -1,7 +1,8 @@
 bumpMinorPreMajor: true
 handleGHRelease: true
 releaseType: java-yoshi
-extraFiles: ["README.md"]
+extraFiles:
+  - README.md
 branches:
   - bumpMinorPreMajor: true
     handleGHRelease: true
@@ -31,3 +32,9 @@ branches:
     handleGHRelease: true
     releaseType: java-backport
     branch: 2.15.x
+  - bumpMinorPreMajor: true
+    handleGHRelease: true
+    releaseType: java-backport
+    extraFiles:
+      - README.md
+    branch: 2.22.x

.github/sync-repo-settings.yaml

@@ -129,6 +129,23 @@ branchProtectionRules:
       - cla/google
       - 'Kokoro - Test: Java GraalVM Native Image'
       - 'Kokoro - Test: Java 17 GraalVM Native Image'
+  - pattern: 2.22.x
+    isAdminEnforced: true
+    requiredApprovingReviewCount: 1
+    requiresCodeOwnerReviews: true
+    requiresStrictStatusChecks: false
+    requiredStatusCheckContexts:
+      - dependencies (8)
+      - dependencies (11)
+      - lint
+      - clirr
+      - units (8)
+      - units (11)
+      - 'Kokoro - Test: Integration'
+      - cla/google
+      - OwlBot Post Processor
+      - 'Kokoro - Test: Java GraalVM Native Image'
+      - 'Kokoro - Test: Java 17 GraalVM Native Image'
 permissionRules:
   - team: yoshi-admins
     permission: admin