Revert "Revert "Generated iam policy updaters for terraform-google-conversion"" (#4414)
Revert "Revert "Generated iam policy updaters for terraform-google-conversion"" (#4414)

* Revert "Revert "Generated iam policy updaters for terraform-google-conversion (#4406)" (#4413)"

This reverts commit c1d7a27266d11e631c14a88cf7e3b2639df574cc.

* Corrected ruby linting errors

* Switched to a guard clause per robocop
GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules