Add GH workflows for cherry-picking PRs to release branches

.github/workflows/pr-cherry-pick-clean.yaml

@@ -0,0 +1,28 @@
+name: "Clean cherry pick PR branch"
+
+on:
+  pull_request_target:
+    branches:
+      - 'release-v**.x'
+    types: [closed]
+
+jobs:
+  delete-cherry-pick-branch:
+    runs-on: ubuntu-latest
+    steps:
+      - name: delete-cherry-pick-branch
+        uses: actions/github-script@v6
+        env:
+          REPO: ${{ secrets.SBO_CHERRY_PICK_REPO }}
+        with:
+          github-token: ${{ secrets.SBO_CHERRY_PICK_BOT_TOKEN }}
+          script: |
+            const [owner, repo] = process.env.REPO.split('/');
+            const ref = `heads/${context.payload.pull_request.head.ref}`;
+            const deleteParams = { owner, repo, ref };
+            console.log(`Deleting branch: "${ref}"`);
+            try {
+              github.rest.git.deleteRef(deleteParams);
+            } catch(e) {
+              console.log("Cannot delete branch; error:", e);
+            }

.github/workflows/pr-cherry-picks.yaml

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+name: "Cherry pick PR to release branches"
+
+on:
+  pull_request_target:
+    branches:
+      - master
+    types: [closed]
+
+jobs:
+  cherry_pick_release_v1_1_x:
+    runs-on: ubuntu-latest
+    name: Cherry pick into release-v1.1.x branch
+    if: contains(github.event.pull_request.labels.*.name, 'release/v1.1.x') && github.event.pull_request.merged
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Setup SSH for cherry-pick repo
+        uses: webfactory/[email protected]
+        with:
+          ssh-private-key: ${{ secrets.SBO_CHERRY_PICK_REPO_SSH_PRIVATE_KEY }}
+      - name: Cherry pick into release-v1.1.x
+        uses: pmacik/github-cherry-pick-action@main
+        with:
+          cherry-pick-repo: ${{ secrets.SBO_CHERRY_PICK_REPO }}
+          token: ${{ secrets.SBO_CHERRY_PICK_BOT_TOKEN }}
+          branch: release-v1.1.x
+          labels: |
+            cherry-pick
+          title-prefix: "cherry-pick(release-v1.1.x): "
+  cherry_pick_release_v1_2_x:
+    runs-on: ubuntu-latest
+    name: Cherry pick into release-v1.2.x branch
+    if: contains(github.event.pull_request.labels.*.name, 'release/v1.2.x') && github.event.pull_request.merged
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Setup SSH for cherry-pick repo
+        uses: webfactory/[email protected]
+        with:
+          ssh-private-key: ${{ secrets.SBO_CHERRY_PICK_REPO_SSH_PRIVATE_KEY }}
+      - name: Cherry pick into release-v1.2.x
+        uses: pmacik/github-cherry-pick-action@main
+        with:
+          cherry-pick-repo: ${{ secrets.SBO_CHERRY_PICK_REPO }}
+          token: ${{ secrets.SBO_CHERRY_PICK_BOT_TOKEN }}
+          branch: release-v1.2.x
+          labels: |
+            cherry-pick
+          title-prefix: "cherry-pick(release-v1.2.x): "