Add test case for usage of S3 Object Lock in remote state backend

[pdecat]

This PR adds a test case for verifying the compatibility of S3 Object Lock with S3 remote state backend,
as #23127 reported it was not working properly.

Test results:

# TF_S3_TEST=1 go test -v ./internal/backend/remote-state/s3/ -run TestRemoteClientObjectLocks
=== RUN   TestRemoteClientObjectLocks
    client_test.go:49: TestBackendConfig on *s3.Backend with configs.synthBody{Filename:"<TestWrapConfig>", Values:map[string]cty.Value{"bucket":cty.StringVal("terraform-remote-s3-test-61893862"), "encrypt":cty.True, "key":cty.StringVal("testState")}}
    backend_test.go:694: creating S3 bucket terraform-remote-s3-test-61893862 in us-west-2
    backend_test.go:739: WARNING: Failed to delete the test S3 bucket. It may have been left in your AWS account and may incur storage charges. (error was BucketNotEmpty: The bucket you tried to delete is not empty. You must delete all versions in the bucket.
                status code: 409, request id: QYT049JZMWK158C7, host id: 7FhDcdSMlLQi8Z/YSn0QrXteJVbwwTnZ5pECZH/2kQYRS5Dkk9yr1TJE/K8w6Y/Aoo86gDtToB8=)
--- PASS: TestRemoteClientObjectLocks (7.63s)
PASS
ok      github.com/hashicorp/terraform/internal/backend/remote-state/s3 7.640s

# aws s3api get-object-lock-configuration --bucket terraform-remote-s3-test-61893862
{
    "ObjectLockConfiguration": {
        "ObjectLockEnabled": "Enabled",
        "Rule": {
            "DefaultRetention": {
                "Mode": "COMPLIANCE",
                "Days": 1
            }
        }
    }
}

Note: this creates S3 buckets and objects that cannot be destroyed before the expiration of the retention delay (hard-coded to 1 day in the testing code).

[hashicorp-cla]

All committers have signed the CLA.

[crw]

Thanks for this submission! Although I cannot commit to having this PR reviewed at this time, we acknowledge your contribution and appreciate it! Thanks again!

[pdecat]

Closing as terraform is no longer open source software.

[github-actions]

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