Allow parallelization of per instance config deletions by not locking on the IGM (GoogleCloudPlatform#12864)

Author: askubis

mmv1/templates/terraform/custom_delete/per_instance_config.go.tmpl

@@ -3,7 +3,7 @@
 		return err
 	}
 
-	lockName, err := tpgresource.ReplaceVars(d, config, "instanceGroupManager/{{"{{"}}project{{"}}"}}/{{"{{"}}zone{{"}}"}}/{{"{{"}}instance_group_manager{{"}}"}}")
+	lockName, err := tpgresource.ReplaceVars(d, config, "instanceGroupManager/{{"{{"}}project{{"}}"}}/{{"{{"}}zone{{"}}"}}/{{"{{"}}instance_group_manager{{"}}"}}/{{"{{"}}name{{"}}"}}")
 	if err != nil {
 		return err
 	}

mmv1/templates/terraform/custom_delete/region_per_instance_config.go.tmpl

@@ -3,7 +3,7 @@
 		return err
 	}
 
-	lockName, err := tpgresource.ReplaceVars(d, config, "instanceGroupManager/{{"{{"}}project{{"}}"}}/{{"{{"}}region{{"}}"}}/{{"{{"}}region_instance_group_manager{{"}}"}}")
+	lockName, err := tpgresource.ReplaceVars(d, config, "instanceGroupManager/{{"{{"}}project{{"}}"}}/{{"{{"}}region{{"}}"}}/{{"{{"}}region_instance_group_manager{{"}}"}}/{{"{{"}}name{{"}}"}}")
 	if err != nil {
 		return err
 	}