feat: setup 1.123.x lts branch (#1676)

Author: burkedavison

.github/release-please.yml

@@ -30,3 +30,7 @@ branches:
  handleGHRelease: true
  releaseType: java-backport
  branch: 1.121.x
+ - bumpMinorPreMajor: true
+ handleGHRelease: true
+ releaseType: java-backport
+ branch: 1.123.x

.github/sync-repo-settings.yaml

@@ -135,6 +135,23 @@ branchProtectionRules:
  - OwlBot Post Processor
  - 'Kokoro - Test: Java GraalVM Native Image'
  - 'Kokoro - Test: Java 17 GraalVM Native Image'
+ - pattern: 1.123.x
+ isAdminEnforced: true
+ requiredApprovingReviewCount: 1
+ requiresCodeOwnerReviews: true
+ requiresStrictStatusChecks: false
+ requiredStatusCheckContexts:
+ - dependencies (17)
+ - lint
+ - clirr
+ - units (8)
+ - units (11)
+ - 'Kokoro - Test: Integration'
+ - Kokoro - Against Pub/Sub Lite samples
+ - cla/google
+ - OwlBot Post Processor
+ - 'Kokoro - Test: Java GraalVM Native Image'
+ - 'Kokoro - Test: Java 17 GraalVM Native Image'
 permissionRules:
  - team: yoshi-admins
  permission: admin