backend/s3: Add `allowed_account_ids` and `forbidden_account_ids` parameters

[gdavison]

Terraform Version

N/A

Use Cases

Adding allowed_account_ids and forbidden_account_ids parameters will allow restricting accounts. This will add parity with the AWS Provider

Attempted Solutions

N/A

Proposal

No response

References

No response

[jar-b]

These config arguments (and the corresponding logic) are currently only defined in the AWS provider.

https://github.com/hashicorp/terraform-provider-aws/blob/824f4d9172e86218973a3e997566d725c3a5429e/internal/conns/config.go#L27
https://github.com/hashicorp/terraform-provider-aws/blob/824f4d9172e86218973a3e997566d725c3a5429e/internal/conns/config.go#L170-L188

It may make sense to move this down into aws-sdk-go-base V2 so the logic can be shared between the AWS Provider and S3 backend.

[github-actions]

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