Add sleep so google_project is ready before returning

[rileykarson]

Fixes hashicorp/terraform-provider-google#5649

Release Note Template for Downstream PRs (will be copied)

resourcemanager: added a wait to `google_project` so that projects are more likely to be ready before the resource finishes creation

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 1 file changed, 4 insertions(+))
Terraform Beta: Diff ( 1 file changed, 4 insertions(+))

[chrisst]

I understand why this is pretty close to the only solution but it makes me so sad. Is there an upstream bug for this? I'd love to attach a TODO with the bug number so it can be removed once this API starts behaving better.

[rileykarson]

Ehh- I'm not sure that it will. There's a lot of setup at project create time, unfortunately.