ci: add an option to clear cache (#11801)

.github/workflows/clear-caches.yml

@@ -0,0 +1,31 @@
+name: Clear cache
+
+on:
+  workflow_dispatch:
+
+permissions:
+  actions: write
+
+jobs:
+  clear-cache:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clear cache
+        uses: actions/github-script@v7
+        with:
+          script: |
+            console.log("Querying")
+            const caches = await github.rest.actions.getActionsCacheList({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+            })
+            for (const cache of caches.data.actions_caches) {
+              console.log(cache)
+              # Dry run
+              # github.rest.actions.deleteActionsCacheById({
+              #   owner: context.repo.owner,
+              #   repo: context.repo.repo,
+              #   cache_id: cache.id,
+              # })
+            }
+            console.log("Clear completed")