Added status check and watch check (Azure#35912)

Author: raych1

.github/workflows/breaking-change-cross-version-status.yaml

@@ -0,0 +1,35 @@
+name: "[TEST-IGNORE] Breaking Change(Cross-Version) - Set Status"
+
+on:
+  # Must run on pull_request_target instead of pull_request, since the latter cannot trigger on
+  # labels from bot accounts in fork PRs. pull_request_target is also more similar to the other
+  # trigger "workflow_run" -- they are both privileged and run in the target branch and repo --
+  # which simplifies implementation.
+  pull_request_target:
+    types:
+      # Run workflow on default types, to update status as quickly as possible.
+      - opened
+      - synchronize
+      - reopened
+      # Depends on labels, so must re-evaluate whenever a relevant label is manually added or removed.
+      - labeled
+      - unlabeled
+  workflow_run:
+    workflows: ["\\[TEST-IGNORE\\] Breaking Change(Cross-Version) - Analyze Code"]
+    types: [completed]
+
+permissions:
+  actions: read
+  contents: read
+  issues: read
+  pull-requests: read
+  statuses: write
+
+jobs:
+  breaking-change-cross-version-status:
+    name: Set Breaking Change(Cross-Version) Status
+    uses: ./.github/workflows/_reusable-set-check-status.yaml
+    with:
+      monitored_workflow_name: "[TEST-IGNORE] Breaking Change(Cross-Version) - Analyze Code"
+      required_check_name: "[TEST-IGNORE] Breaking Change(Cross-Version)"
+      overriding_label: "BreakingChange-Approved-Benign,BreakingChange-Approved-BugFix,BreakingChange-Approved-UserImpact,BreakingChange-Approved-BranchPolicyException,BreakingChange-Approved-Previously,BreakingChange-Approved-Security,Versioning-Approved-Benign,Versioning-Approved-BugFix,Versioning-Approved-PrivatePreview,Versioning-Approved-BranchPolicyException,Versioning-Approved-Previously,Versioning-Approved-Retired"

.github/workflows/watch-breakingchange-crossversion.yaml

@@ -0,0 +1,25 @@
+# Use ~ to sort the workflow to the bottom of the list
+name: "~Watch - Breaking Change(Cross-Version)"
+
+on:
+  # check_suite is preferred over check_run to avoid triggering on all check
+  # runs. In some cases, check_run must be used in testing environments.
+  check_suite:
+    types: completed
+
+  workflow_run:
+    types: completed
+    workflows:
+      - "\\[TEST-IGNORE\\] Breaking Change(Cross-Version) - Set Status"
+
+permissions:
+  checks: read
+  contents: read
+
+jobs:
+  BreakingChangeCrossVersion:
+    name: Watch Breaking Change(Cross-Version)
+    uses: ./.github/workflows/_reusable-verify-run-status.yaml
+    with:
+      check_run_name: "Breaking Change(Cross-Version)"
+      commit_status_name: "[TEST-IGNORE] Breaking Change(Cross-Version)"