Switch to terraform-google-group module to create Google Workspace groups

[xingao267]

Major changes are to be made in https://github.com/terraform-google-modules/terraform-google-project-factory/blob/master/modules/gsuite_enabled/main.tf

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days

[morgante]

This is still a good idea.