build: update to new remote instance name for RBE

Update to use remote instance name, primary_instance, for RBE

Author: josephperrott

.bazelrc

@@ -125,7 +125,7 @@ build:remote --host_platform=//tools:rbe_ubuntu1604-angular
 build:remote --platforms=//tools:rbe_ubuntu1604-angular
 
 # Remote instance and caching
-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
 build:remote --remote_cache=remotebuildexecution.googleapis.com
 build:remote --remote_executor=remotebuildexecution.googleapis.com