⚙️ add helm unit test job to release workflow

Author: aureq

.github/workflows/release.yaml

@@ -19,8 +19,37 @@ env:
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
+
+  helm-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: step-security/harden-runner@e3f713f2d8f53843e71c69a996d56f51aa9adfb9 # v2.14.1
+        with:
+          egress-policy: audit
+      - name: Checkout
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v4.3.1
+        # with:
+        #   version: v3.19.5
+
+      - name: Install Helm unittest plugin
+        run: |
+          make install-helm-unittest
+
+      - name: Run the Chart unit tests
+        run: |
+          make helm-unittest
+
   build-and-push-image:
     runs-on: ubuntu-latest
+
+    needs:
+      - helm-test
+
     permissions:
       contents: read
       packages: write