Added copying of handwritten iam updater files (#4420)
Added copying of handwritten iam updater files (#4420)

* Added copying of handwritten iam updater files

* Fixed rubocop error
GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules