feat(delivery): add user-specified project IDs to Terraform cfg

[ace-n]

No description provided.

[grayside]

Shouldn't this change remove the billing account/emblem suffix, and changes to the cloudbuild.yaml to pass in the full project names?

[ace-n]

I was hoping to keep it more tightly scoped than that, but I can go ahead and do those here.

[ace-n]

Note: I have not tested setup.sh end-to-end yet, as I'm not sure it currently works properly even without these changes.

I'm holding off on that testing until I think it will work, to minimize the changes that I have to make to get it working.

@grayside PLMK if that's an issue for you.

[grayside]

How do you know what's missing if you've not tested?

[ace-n]

I was (previously) comparing it against a known-working setup-v2.sh file that does things like automatically creating projects.

I went ahead and tested it though. tf apply succeeds, and I made some changes to get the Cloud Builds working with user-provided project IDs.

(They fail due to a missing service account issue, which may be due to using an old project with an outdated Terraform config. In any case, that's likely a Terraform problem so I don't think it belongs in this PR.)