Offer collector updates automatically

.github/workflows/update_collector.yaml

@@ -0,0 +1,44 @@
+name: Check for new collector versions
+
+# Description:
+# This workflow is responsible for checking for new versions of the collector.
+
+
+on:
+  schedule:
+    # Run every 12th hour at minute 40 past.
+    - cron: "40 */12 * * *"
+  workflow_dispatch:
+
+
+env:
+  VALUES_YAML: helm-charts/splunk-otel-collector/values.yaml
+  LATEST_API: https://api.github.com/repos/signalfx/splunk-otel-collector/releases/latest
+
+jobs:
+  maybe_update:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Update Version
+        id: update
+        run: |
+          LATEST_VER=$(curl -L -qs -H 'Accept: application/vnd.github+json' https://api.github.com/repos/signalfx/splunk-otel-collector/releases/latest | jq -r .tag_name)
+          sed -i "s/appVersion:.*/appVersion: ${LATEST_VER##v}/" helm-charts/splunk-otel-collector/Chart.yaml
+          make render
+          git diff --exit-code
+          NEED_UPDATE=$?
+          echo "LATEST_VER=${LATEST_VER}" >> "$GITHUB_OUTPUT"
+          echo "NEED_UPDATE=${NEED_UPDATE}" >> "$GITHUB_OUTPUT"
+      - name: PR the new version
+        if: ${{ steps.update.outputs.NEED_UPDATE == 1 }}
+        uses: peter-evans/create-pull-request@v5
+        with:
+          commit-message: Update collector version
+          title: Update collector version to ${{ steps.update.outputs.LATEST_VER }}
+          body: Use the new version of the collector
+          branch: "update-${{ steps.swizzle_version.outputs.LATEST_VER }}"
+          base: main
+          delete-branch: true
+          modify-outputs: false