CI: More CI workflows.

.github/workflows/pr-metadata.yaml

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+name: "Pull Request: Get metadata"
+
+on:
+  workflow_call:
+    outputs:
+      isRenovatePR:
+        description: "Is the PR coming from Renovate?"
+        value: ${{ jobs.pr-metadata.outputs.isRenovatePR }}
+      isFork:
+        description: "Is the PR coming from a forked repo?"
+        value: ${{ jobs.pr-metadata.outputs.isFork }}
+      addedOrModifiedFilesDetected:
+        description: "Does the PR contain any changes?"
+        value: ${{ jobs.pr-changes.outputs.addedOrModifiedFilesDetected }}
+      addedOrModifiedFiles:
+        description: "A list of the files changed in this PR"
+        value: ${{ jobs.pr-changes.outputs.addedOrModifiedFiles }}
+      addedOrModifiedCharts:
+        description: "A list of the charts changed in this PR"
+        value: ${{ jobs.pr-changes.outputs.addedOrModifiedCharts }}
+      chartsToLint:
+        value: ${{ jobs.pr-changes.outputs.chartsToLint }}
+      chartsToInstall:
+        value: ${{ jobs.pr-changes.outputs.chartsToInstall }}
+
+jobs:
+  pr-metadata:
+    name: Collect PR metadata
+    runs-on: ubuntu-latest
+    outputs:
+      isRenovatePR: ${{ startsWith(steps.branch-name.outputs.current_branch, 'renovate/') }}
+      isFork: ${{ github.event.pull_request.head.repo.full_name != github.repository }}
+    steps:
+      - name: Get branch name
+        id: branch-name
+        uses: tj-actions/branch-names@v6.5
+
+      - name: Save PR data to file
+        env:
+          PR_NUMBER: ${{ github.event.number }}
+        run: |
+          echo $PR_NUMBER > pr_number.txt
+
+      - name: Store pr data in artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: pr_metadata
+          path: ./pr_number.txt
+          retention-days: 5
+
+  pr-changes:
+    name: Collect PR changes
+    runs-on: ubuntu-latest
+    outputs:
+      addedOrModifiedFilesDetected: ${{ steps.changed-files.outputs.allAddedOrModified }}
+      addedOrModifiedFiles: ${{ steps.changed-files.outputs.allAddedOrModified_files }}
+      addedOrModifiedCharts: ${{ steps.changed-charts.outputs.charts }}
+      chartsToLint: ${{ steps.changed-charts.outputs.chartsToLint }}
+      chartsToInstall: ${{ steps.changed-charts.outputs.chartsToInstall }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Collect changed files
+        uses: dorny/paths-filter@v2
+        id: changed-files
+        with:
+          list-files: json
+          filters: |
+            allAddedOrModified:
+              - added|modified: '**'
+
+      - name: Collect changed charts
+        uses: bjw-s/helm-charts-actions/collect-charts@main
+        id: changed-charts

.github/workflows/pr-validate.yaml

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+name: "Pull Request: Validate"
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.head_ref }}-pr-validate
+  cancel-in-progress: true
+
+jobs:
+  pr-metadata:
+    uses: ./.github/workflows/pr-metadata.yaml
+
+  charts-changelog:
+    uses: ./.github/workflows/charts-changelog.yaml
+    needs:
+      - pr-metadata
+    with:
+      isRenovatePR: ${{ needs.pr-metadata.outputs.isRenovatePR }}
+      modifiedCharts: ${{ needs.pr-metadata.outputs.addedOrModifiedCharts }}
+
+  charts-lint:
+    uses: ./.github/workflows/charts-lint.yaml
+    needs:
+      - pr-metadata
+    with:
+      checkoutCommit: ${{ github.sha }}
+      chartsToLint: ${{ needs.pr-metadata.outputs.chartsToLint }}
+      isRenovatePR: ${{ needs.pr-metadata.outputs.isRenovatePR }}