[RN][CI] enable gradle action cleanup + closed Prs

Enable `gradle-home-cache-cleanup` to attempt to limit the growth of the
`gradle-home-v1-*` cache entries. When these entries grow too large bad
things happen. See [1].

Added cleanup-pr-cache to remove cache entries created by a PR, when the
PR is closed.

[1] https://github.com/gradle/actions/blob/main/docs/setup-gradle.md#remove-unused-files-from-gradle-user-home-before-saving-to-the-cache

Changelog: [Internal]

.github/actions/setup-gradle/action.yml

@@ -7,3 +7,7 @@ runs:
       uses: gradle/actions/setup-gradle@v3
       with:
         gradle-version: wrapper
+        # The gradle-home-v1 cache entry grows very, eventually failing the jobs
+        # when extracted.
+        gradle-home-cache-cleanup: true
+

.github/workflows/cleanup-pr-cache.yml

@@ -0,0 +1,30 @@
+# From: https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#force-deleting-cache-entries
+name: cleanup caches by a branch that was closed
+on:
+  pull_request:
+    types:
+      - closed
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Cleanup
+        run: |
+          gh extension install actions/gh-actions-cache
+
+          echo "Fetching list of cache key"
+          cacheKeysForPR=$(gh actions-cache list -R $REPO -B $BRANCH -L 100 | cut -f 1 )
+
+          ## Setting this to not fail the workflow while deleting cache keys.
+          set +e
+          echo "Deleting caches..."
+          for cacheKey in $cacheKeysForPR
+          do
+              gh actions-cache delete $cacheKey -R $REPO -B $BRANCH --confirm
+          done
+          echo "Done"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REPO: ${{ github.repository }}
+          BRANCH: refs/pull/${{ github.event.pull_request.number }}/merge