Adds setop to clean up docker images

Author: agustingroh

Diff for: .github/workflows/tests.yml

@@ -13,6 +13,9 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Clean up docker images
+        run: docker system prune -af
+
       - name: Install tfx-cli
         run: npm install -g tfx-cli