b/aws_caller_identity: fix error when sts_region is different from default_region

[johnsonaj]

Description

Error: SignatureDoesNotMatch: Credential should be scoped to a valid region.

% AWS_DEFAULT_REGION=us-west-2 AWS_ALTERNATE_REGION=us-east-1 make testacc TESTARGS='-run=TestAccSTSCallerIdentityDataSource_stsRegion' PKG=sts

==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/sts/... -v -count 1 -parallel 20  -run=TestAccSTSCallerIdentityDataSource_stsRegion -timeout 360m
    caller_identity_data_source_test.go:47: Step 1/1 error: Error running pre-apply plan: exit status 1

        Error: reading STS Caller Identity

          with data.aws_caller_identity.current,
          on terraform_plugin_test.tf line 21, in data "aws_caller_identity" "current":
          21: data "aws_caller_identity" "current" {}

        operation error STS: GetCallerIdentity, https response error StatusCode: 403,
        RequestID: fe4eadc7-14ba-4419-92e5-18c95845c089, api error
        SignatureDoesNotMatch: Credential should be scoped to a valid region.
--- FAIL: TestAccSTSCallerIdentityDataSource_stsRegion (3.90s)
FAIL
FAIL	github.com/hashicorp/terraform-provider-aws/internal/service/sts	11.052s
FAIL
make: *** [testacc] Error 1

Relations

Closes #34865

References

Output from Acceptance Testing

% AWS_DEFAULT_REGION=us-west-2 AWS_ALTERNATE_REGION=us-east-1 make testacc TESTARGS='-run=TestAccSTSCallerIdentityDataSource_' PKG=sts

==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/sts/... -v -count 1 -parallel 20  -run=TestAccSTSCallerIdentityDataSource_ -timeout 360m
--- PASS: TestAccSTSCallerIdentityDataSource_basic (6.57s)
--- PASS: TestAccSTSCallerIdentityDataSource_stsRegion (15.27s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/sts	22.641s

[github-actions]

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[jar-b]

LGTM 🎉

% AWS_DEFAULT_REGION=us-west-2 AWS_ALTERNATE_REGION=us-east-1 make testacc TESTARGS='-run=TestAccSTSCallerIdentityDataSource_' PKG=sts
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/sts/... -v -count 1 -parallel 20  -run=TestAccSTSCallerIdentityDataSource_ -timeout 360m

=== RUN   TestAccSTSCallerIdentityDataSource_basic
=== PAUSE TestAccSTSCallerIdentityDataSource_basic
=== RUN   TestAccSTSCallerIdentityDataSource_alternateRegion
=== PAUSE TestAccSTSCallerIdentityDataSource_alternateRegion
=== CONT  TestAccSTSCallerIdentityDataSource_basic
=== CONT  TestAccSTSCallerIdentityDataSource_alternateRegion
--- PASS: TestAccSTSCallerIdentityDataSource_basic (6.94s)
--- PASS: TestAccSTSCallerIdentityDataSource_alternateRegion (15.37s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/sts        22.432s

[github-actions]

This functionality has been released in v5.38.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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