chore: enable releases for 2.30.x branch (#2136)

enable releases

Author: lqiu96

.github/release-please.yml

@@ -51,5 +51,12 @@ branches:
       - >-
         google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/Version.java
     branch: 2.25.x
+  - bumpMinorPreMajor: true
+    handleGHRelease: true
+    releaseType: java-backport
+    extraFiles:
+      - >-
+        google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/Version.java
+    branch: 2.30.x
 extraFiles:
   - google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/Version.java

.github/sync-repo-settings.yaml

@@ -19,7 +19,7 @@ branchProtectionRules:
       - 'Kokoro - Test: Java GraalVM Native Image'
       - 'Kokoro - Test: Java 17 GraalVM Native Image'
       - javadoc
-      - conformance 
+      - conformance
   - pattern: 1.22.0-sp
     isAdminEnforced: true
     requiredApprovingReviewCount: 1
@@ -124,6 +124,24 @@ branchProtectionRules:
       - OwlBot Post Processor
       - 'Kokoro - Test: Java GraalVM Native Image'
       - 'Kokoro - Test: Java 17 GraalVM Native Image'
+  - pattern: 2.30.x
+    isAdminEnforced: true
+    requiredApprovingReviewCount: 1
+    requiresCodeOwnerReviews: true
+    requiresStrictStatusChecks: false
+    requiredStatusCheckContexts:
+      - dependencies (17)
+      - 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'
+      - javadoc
+      - conformance
 permissionRules:
   - team: yoshi-admins
     permission: admin