gha: add helm lint workflow

Signed-off-by: Michal Fiedorowicz <[email protected]>

.github/workflows/helm-lint.yaml

@@ -0,0 +1,33 @@
+name: Helm - lint
+on:
+  push:
+    branches:
+      - "!release"
+    paths:
+      - "charts/**"
+  pull_request:
+    paths:
+      - "charts/**"
+
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: false
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  go-test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    defaults:
+      run:
+        working-directory: charts
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Helm
+        uses: azure/[email protected]
+      - name: Run helm lint
+        run: helm lint diode