backend/s3: Add parameter `sts_region`

[gdavison]

Terraform Version

N/A

Use Cases

Allow STS authentication to be checked in different region from S3. Some users have restrictions on STS. Adds parity to AWS Provider.

Attempted Solutions

N/A

Proposal

Add parameter sts_region

References

No response

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.