ci(release): call submodule update from release workflow (#105)

(cherry picked from commit ed50629)

# Conflicts:
#	.github/workflows/helm-release.yml

.github/workflows/helm-release.yml

@@ -0,0 +1,57 @@
+name: Release Helm Chart
+
+on:
+  workflow_dispatch:
+
+jobs:
+  helm-release:
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "[email protected]"
+      - name: Get release version
+        id: release-version
+        run: |
+          echo "tag=v$(yq .version charts/cryostat/Chart.yaml)" >> $GITHUB_OUTPUT
+      - name: Get previous version
+        id: previous-version
+        run: |
+          # Filter tags by regex, combine with the Chart version, sort by version number, and output the preceeding version.
+          chart_version="${{ steps.release-version.outputs.tag }}"
+          previous_version="$({ echo v${chart_version}; git tag -l | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$'; } | sort -V | grep -B1 "${chart_version}" | head -n1)"
+          echo "tag=${previous_version}" >> $GITHUB_OUTPUT
+      - name: Generate release notes
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+        run: |
+          gh api --method POST \
+            -H "Accept: application/vnd.github+json" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            /repos/${GITHUB_REPOSITORY}/releases/generate-notes \
+            -f tag_name="${{ steps.release-version.outputs.tag }}" \
+            -f target_commitish="${GITHUB_REF_NAME}" \
+            -f previous_tag_name="${{ steps.previous-version.outputs.tag }}" | jq -r .body > charts/cryostat/release-notes.md
+      - name: Run chart-releaser
+        uses: helm/[email protected]
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+        with:
+          version: v1.5.0
+          charts_dir: charts
+          config: .github/helm-release-config.yml
+
+  update-helm-repo:
+    uses: ./.github/workflows/submodule.yml
+    needs: helm-release
+    if: github.repository_owner == 'cryostatio'
+    secrets:
+      SUBMODULE_TOKEN: ${{ secrets.SUBMODULE_TOKEN }}
+      GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
+      GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}

.github/workflows/submodule.yml

@@ -1,9 +1,14 @@
 name: submodule
 
 on:
-  push:
-    branches:
-      - gh-pages
+  workflow_call:
+    secrets:
+      SUBMODULE_TOKEN:
+        required: true
+      GPG_PRIVATE_KEY:
+        required: true
+      GPG_PASSPHRASE:
+        required: true
 
 defaults:
   run: