Tests: Remove external provider aliases

[ewbankkit]

Description

hashicorp/terraform-plugin-sdk#1092 removes the need to use external provider aliases in acceptance test configurations.

Relations

Relates #27499.
Relates #27615.
Relates #27803.

Output from Acceptance Testing

% make testacc TESTARGS='-run=TestAccEMRContainersVirtualCluster_basic' PKG=emrcontainers
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/emrcontainers/... -v -count 1 -parallel 20  -run=TestAccEMRContainersVirtualCluster_basic -timeout 180m
=== RUN   TestAccEMRContainersVirtualCluster_basic
=== PAUSE TestAccEMRContainersVirtualCluster_basic
=== CONT  TestAccEMRContainersVirtualCluster_basic
--- PASS: TestAccEMRContainersVirtualCluster_basic (1209.44s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/emrcontainers	1216.440s
% make testacc TESTARGS='-run=TestAccBatchComputeEnvironment_eksConfiguration' PKG=batch
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/batch/... -v -count 1 -parallel 20  -run=TestAccBatchComputeEnvironment_eksConfiguration -timeout 180m
=== RUN   TestAccBatchComputeEnvironment_eksConfiguration
=== PAUSE TestAccBatchComputeEnvironment_eksConfiguration
=== CONT  TestAccBatchComputeEnvironment_eksConfiguration
--- PASS: TestAccBatchComputeEnvironment_eksConfiguration (778.42s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/batch	783.646s

[github-actions]

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[github-actions]

This functionality has been released in v4.40.0 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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