Separating image cleanup to its own workflow

.github/workflows/docker-image-cleaup-old-packages.yml

@@ -0,0 +1,19 @@
+name: Cleanup old Docker Images from GitHub Container Registry
+
+on:
+  workflow_dispatch: # Creates button in web UI to run the workflow manually, shouldn't be needed
+  schedule:
+    - cron: '0 0 * * *' # Run at 00:00 UTC every day
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Delete old untagged packages
+        uses: actions/[email protected]
+        with:
+          package-name: sourcegraph/bridge-repo-converter
+          package-type: container
+          min-versions-to-keep: 5
+          delete-only-untagged-versions: 'true'
+          token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/docker-image.yml

@@ -56,12 +56,3 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
-
-      - name: Delete old untagged packages
-        uses: actions/[email protected]
-        with:
-          package-name: sourcegraph/bridge-repo-converter
-          package-type: container
-          min-versions-to-keep: 5
-          delete-only-untagged-versions: 'true'
-          token: ${{ secrets.GITHUB_TOKEN }}