feat: publish superset helm chart (#14163)

* Create initial helm-release action for superset

* Add lintconf to ensure chart passes validation

* Add lint-test job

* Add apache licence headers

* Run job for master only

* Move helm-lint to separate workflow

* Helm release for master & helm dir changes only

* Dummy change to test linter

.github/workflows/superset-helm-lint.yml

@@ -0,0 +1,45 @@
+name: Lint and Test Charts
+
+on:
+  pull_request:
+    paths:
+      - 'helm/**'
+
+jobs:
+  lint-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v1
+        with:
+          version: v3.5.4
+
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+
+      - name: Set up chart-testing
+        uses: helm/chart-testing-action@v2.0.1
+
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed  --print-config)
+          if [[ -n "$changed" ]]; then
+            echo "::set-output name=changed::true"
+          fi
+        env:
+          CT_CHART_DIRS: helm
+          CT_SINCE: HEAD
+
+      - name: Run chart-testing (lint)
+        run: ct lint --print-config
+        env:
+          CT_CHART_DIRS: helm
+          CT_LINT_CONF: lintconf.yaml
+          CT_SINCE: HEAD

.github/workflows/superset-helm-release.yml

@@ -0,0 +1,35 @@
+name: Release Charts
+
+on:
+  push:
+    branches:
+      - 'master'
+    paths:
+      - 'helm/**'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+
+      - name: Install Helm
+        uses: azure/setup-helm@v1
+        with:
+          version: v3.5.4
+
+      - name: Run chart-releaser
+        uses: helm/chart-releaser-action@v1.2.0
+        with:
+          charts_dir: helm
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          CR_RELEASE_NAME_TEMPLATE: "superset-helm-chart-{{ .Version }}"