Retry billing update in project creation

[crhino]

HCPF-2286

🛠️ Description

Building the provider locally and running many project creations at once, I see:

2024-11-14T10:39:46.626-0500 [DEBUG] provider.terraform-provider-hcp: {"code":14, "message":"failed to update billing account", "details":[]}
2024-11-14T10:39:46.626-0500 [WARN]  unexpected data: localhost/providers/hcp:stdout="Error trying to update billing account. Retrying in 10 seconds..."

and that all projects create successfully given time:

hcp_project.proj["project16"]: Creation complete after 1s [name=project16]
hcp_project.proj["project10"]: Still creating... [10s elapsed]
hcp_project.proj["project12"]: Still creating... [10s elapsed]
hcp_project.proj["project12"]: Creation complete after 11s [name=project12]
hcp_project.proj["project10"]: Creation complete after 11s [name=project10]

🏗️ Acceptance tests

• Are there any feature flags that are required to use this functionality?
• Have you added an acceptance test for the functionality being added?
• Have you run the acceptance tests on this branch?

Output from acceptance testing:

$ make testacc TESTARGS='-run=TestAccXXX'

...
=== RUN   TestAccProjectResource
--- PASS: TestAccProjectResource (5.78s)
PASS
ok  	github.com/hashicorp/terraform-provider-hcp/internal/provider/resourcemanager	8.092s

[pierluc-codes]

@crhino can you explain why the retries are necessary? Especially on a 503.