Setup BuildBuddy remote cache

Author: martin4861

.github/workflows/ci.yaml

@@ -30,4 +30,4 @@ jobs:
           password: ${{ secrets.GH_TOKEN }}
 
       - name: Build and test
-        run: bazel test --remote_header=x-buildbuddy-api-key=${{ secrets.BUILDBUDDY_TEST }} //...
+        run: bazel test --remote_header=x-buildbuddy-api-key=${{ secrets.BUILDBUDDY_TEST }} --remote_cache=grpcs://remote.buildbuddy.io --remote_timeout=10m //...