Note: google_folder_iam_policy cannot be used in conjunction with google_folder_iam_binding, google_folder_iam_member, or google_folder_iam_audit_config or they will fight over what your policy should be.
Note: google_folder_iam_binding resources can be used in conjunction with google_folder_iam_member resources only if they do not grant privilege to the same role.
See https://www.terraform.io/docs/providers/google/r/google_folder_iam.html