Consider implementing checks for correct GitLab instance setup

[timofurrer]

We should consider implementing checks to verify if the GitLab instance is correctly spun up.

The best place is probably the healthcheck-and-setup.sh or await-healthy.sh script.

Originally posted by @timofurrer in https://github.com/gitlabhq/terraform-provider-gitlab/pull/1023#discussion_r851960590

[Shocktrooper]

@timofurrer Any thoughts on which file is preferable?

[PatrickRice-KSC]

Seems like the healthcheck-and-setup is the right spot, just to make it idempotent.

[timofurrer]

I came to the conclusion that this will be not worth to implement - the effort is too big for what we'll gain. I'm going to close it.