Implement remote caching

Author: Andrew-Dame

.bazelrc

@@ -3,3 +3,9 @@ common --incompatible_default_to_explicit_init_py
 
 # Use a minimal venv and don't require a system python to bootstrap
 common --@rules_python//python/config_settings:bootstrap_impl=script
+
+# Remote caching. Write is limited to CI.
+common --google_default_credentials=true
+common --remote_cache="grpcs://remotebuildexecution.googleapis.com"
+common --remote_instance_name=projects/ml-oss-rbe-testing/instances/default_instance
+common --remote_default_exec_properties=cache-silo-key=google_ml_actions_v1