chore: Update cache cleanup workflow

Update the cache cleanup workflow to run on ubuntu-latest and rename it to 'Cleanup Cache'.
Also, the workflow is triggered on pull request close and workflow dispatch.
Finally, it uses the openMF/mifos-mobile-github-actions cache cleanup action.

.github/workflows/cache-cleanup.yaml

@@ -2,17 +2,14 @@ name: Cleanup Cache
 
 on:
   pull_request:
-    types: [closed]
+    types: [ closed ]
   workflow_dispatch:
 
 jobs:
   cleanup:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Run Cache Cleanup
-        uses: openMF/mifos-mobile-github-actions/.github/workflows/cache-cleanup.yaml@main
-        with:
-          cleanup_pr: ${{ github.event_name == 'pull_request' && github.event.repository.private == true }}
-          cleanup_all: ${{ github.event_name == 'workflow_dispatch' }}
-        secrets:
-          token: ${{ secrets.GITHUB_TOKEN }}
+    uses: openMF/mifos-mobile-github-actions/.github/workflows/cache-cleanup.yaml@main
+    with:
+      cleanup_pr: ${{ github.event_name == 'pull_request' && github.event.repository.private == true }}
+      cleanup_all: ${{ github.event_name == 'workflow_dispatch' }}
+    secrets:
+      token: ${{ secrets.GITHUB_TOKEN }}