feat(ci): GEN-2128 add auto cherry pick workflow

.github/workflows/auto-cherry-pick-labeled-prs.yaml

@@ -0,0 +1,76 @@
+---
+name: Cherry-pick labeled PRs to OpenMetadata release branch on merge
+# yamllint disable-line rule:comments
+run-name: OpenMetadata release cherry-pick PR #${{ github.event.pull_request.number }}
+
+# yamllint disable-line rule:truthy
+on:
+  pull_request:
+    types: [closed]
+    branches:
+      - main
+permissions:
+  contents: write
+  pull-requests: write
+env:
+  CURRENT_RELEASE_ENDPOINT: ${{ vars.CURRENT_RELEASE_ENDPOINT }}  # Endpoint that returns the current release version in json format
+jobs:
+  cherry_pick_to_release_branch:
+    if: github.event.pull_request.merged == true &&
+        contains(github.event.pull_request.labels.*.name, 'To release')
+    runs-on: ubuntu-latest  # Running it on ubuntu-latest on purpose (we're not using all the free minutes)
+    steps:
+      - name: Checkout main branch
+        uses: actions/checkout@v4
+        with:
+          ref: main
+          fetch-depth: 0
+      - name: Get the release version
+        id: get_release_version
+        run: |
+          CURRENT_RELEASE=$(curl -s $CURRENT_RELEASE_ENDPOINT | jq -r .om_branch)
+          echo "CURRENT_RELEASE=${CURRENT_RELEASE}" >> $GITHUB_ENV
+      - name: Cherry-pick changes from PR
+        id: cherry_pick
+        continue-on-error: true
+        run: |
+          git config --global user.email "release-bot@open-metadata.org"
+          git config --global user.name "OpenMetadata Release Bot"
+          git fetch origin ${CURRENT_RELEASE}
+          git checkout ${CURRENT_RELEASE}
+          git cherry-pick -x ${{ github.event.pull_request.merge_commit_sha }}
+      - name: Push changes to release branch
+        id: push_changes
+        continue-on-error: true
+        if: steps.cherry_pick.outcome == 'success'
+        run: |
+          git push origin ${CURRENT_RELEASE}
+      - name: Post a comment on failure
+        if: steps.cherry_pick.outcome != 'success' || steps.push_changes.outcome != 'success'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const prNumber = context.payload.pull_request.number;
+            const releaseVersion = process.env.CURRENT_RELEASE;
+            const workflowRunUrl = `${process.env.GITHUB_SERVER_URL}/${process.env.GITHUB_REPOSITORY}/actions/runs/${process.env.GITHUB_RUN_ID}`;
+            github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: prNumber,
+              body: `Failed to cherry-pick changes to the ${releaseVersion} branch.
+                Please cherry-pick the changes manually.
+                You can find more details [here](${workflowRunUrl}).`
+            })
+      - name: Post a comment on success
+        if: steps.cherry_pick.outcome == 'success' && steps.push_changes.outcome == 'success'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const prNumber = context.payload.pull_request.number;
+            const releaseVersion = process.env.CURRENT_RELEASE;
+            github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: prNumber,
+              body: `Changes have been cherry-picked to the ${releaseVersion} branch.`
+            })