build: update to new remote instance name for RBE

Update to use remote instance name, primary_instance, for RBE

(cherry picked from commit 4d31fc6)

Author: josephperrott

.bazelrc

@@ -89,7 +89,7 @@ test --test_output=errors
 ################################
 
 # Use the Angular team internal GCP instance for remote execution.
-build:remote --remote_instance_name=projects/internal-200822/instances/default_instance
+build:remote --remote_instance_name=projects/internal-200822/instances/primary_instance
 build:remote --project_id=internal-200822
 
 # Starting with Bazel 0.27.0 strategies do not need to be explicitly