Add EKS configuration to AWS Batch

[bschaatsbergen]

Description

AWS Batch introduced support for Amazon Elastic Kubernetes Service (Amazon EKS), enabling customers to run their jobs on Amazon EKS clusters as Kubernetes pods.

This pull request introduces a new block: eks_configuration.

Relations

Closes #27466.
Closes #26931.
Closes #26930.

References

Output from Acceptance Testing

$ make testacc TESTS=TestAccBatchComputeEnvironment_eksConfiguration PKG=batch

[github-actions]

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[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccBatchComputeEnvironment_eksConfiguration' PKG=batch ACCTEST_PARALLELISM=2
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/batch/... -v -count 1 -parallel 2  -run=TestAccBatchComputeEnvironment_eksConfiguration -timeout 180m
=== RUN   TestAccBatchComputeEnvironment_eksConfiguration
=== PAUSE TestAccBatchComputeEnvironment_eksConfiguration
=== CONT  TestAccBatchComputeEnvironment_eksConfiguration
--- PASS: TestAccBatchComputeEnvironment_eksConfiguration (719.73s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/batch	723.854s
% make testacc TESTARGS='-run=TestAccBatchComputeEnvironment_basic' PKG=batch ACCTEST_PARALLELISM=2
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/batch/... -v -count 1 -parallel 2  -run=TestAccBatchComputeEnvironment_basic -timeout 180m
=== RUN   TestAccBatchComputeEnvironment_basic
=== PAUSE TestAccBatchComputeEnvironment_basic
=== CONT  TestAccBatchComputeEnvironment_basic
--- PASS: TestAccBatchComputeEnvironment_basic (44.61s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/batch	52.175s

[github-actions]

This functionality has been released in v4.38.0 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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