Update chart publishing workflow

Author: afritzler

.github/workflows/release-chart.yaml

@@ -1,24 +1,39 @@
 name: Release Helm Charts
 
 on:
+  release:
+    types:
+      - published
   push:
     branches:
       - main
     paths:
       - 'charts/gardener-extension-provider-ironcore/**'
-  workflow_dispatch:
+      - 'charts/gardener-extension-admission-ironcore/**'
+    tags:
+      - 'v*.*.*'
+  pull_request:
+    branches:
+      - main
+    paths-ignore:
+      - 'docs/**'
+      - '**/*.md'
+    types: [labeled, opened, synchronize, reopened]
 
 jobs:
   helm-chart:
     runs-on: ubuntu-latest
     permissions:
       contents: read
       packages: write
+
+    if: |
+      github.event_name == 'push' ||
+      (github.event_name == 'pull_request' && contains(github.event.pull_request.labels.*.name, 'ok-to-charts')) ||
+      (github.event_name == 'release' && github.event.action == 'published')
     steps:
-      - name: Checkout
+      - name: Checkout code
         uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
 
       - name: Set up Helm
         uses: azure/setup-helm@v4
@@ -44,18 +59,12 @@ jobs:
         run: |
           echo "${{ secrets.GITHUB_TOKEN }}" | helm registry login ghcr.io -u ${{ github.actor }} --password-stdin
 
-      - name: Package provider Helm chart
+      - name: Package Helm charts
         run: |
           helm package charts/gardener-extension-provider-ironcore --version ${{ steps.chart_version.outputs.version }}
-
-      - name: Push provider Helm chart to GHCR
-        run: |
-          helm push gardener-extension-provider-ironcore-${{ steps.chart_version.outputs.version }}.tgz oci://ghcr.io/${{ github.repository_owner }}/charts
-
-      - name: Package admission Helm chart
-        run: |
           helm package charts/gardener-extension-admission-ironcore --version ${{ steps.chart_version.outputs.version }}
 
-      - name: Push admission Helm chart to GHCR
+      - name: Push Helm charts to GHCR
         run: |
-          helm push gardener-extension-admission-ironcore-${{ steps.chart_version.outputs.version }}.tgz oci://ghcr.io/${{ github.repository_owner }}/charts
+          helm push gardener-extension-provider-ironcore-${{ steps.chart_version.outputs.version }}.tgz oci://ghcr.io/${{ github.repository_owner }}/charts
+          helm push gardener-extension-admission-ironcore-${{ steps.chart_version.outputs.version }}.tgz oci://ghcr.io/${{ github.repository_owner }}/charts