add Github Actions to release CL2

.github/workflows/clusterloader2-release.yml

@@ -0,0 +1,39 @@
+name: Build and Push Docker Image for clusterloader2
+
+on:
+  push:
+    branches:
+      - main
+      - official/v*
+    paths:
+      - "clusterloader2/**"
+    tags:
+      - "v*"
+
+env:
+  IMAGE_REPO: ghcr.io/${{ github.repository_owner }}
+  IMAGE_TAG: ${{ github.ref_name }}
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push image
+        run: |
+          cd clusterloader2
+          make build-image
+          make push-image