Automate Github Actions cache clean up (#1870)

* upgrade abseil to August 2025, Patch 1

* add gh action to clear all gh actions cache

* add gh action to clear all gh actions cache

Author: neodix42

.github/workflows/clear-gh-cache.yml

@@ -0,0 +1,13 @@
+name: Clear all GH cache
+
+on:
+  workflow_dispatch
+
+jobs:
+  clear-cache:
+    env:
+      GH_TOKEN: ${{ github.token }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clear all cache
+        run: gh cache delete --all