### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When multi uploading a file for Glacier Instant Retrieval, the operation fails at Complete stage with a message claiming storage class not supported.

### Expected Behavior

It works with real S3.

### How are you starting LocalStack?

With the `localstack` script

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

localstack start

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

 ```golang
	b, p := parse1(path)
	cmuI := &awsS3.CreateMultipartUploadInput{
		Bucket:       b,
		Key:          p,
		StorageClass: mtypes.StorageClassGlacierIr,
	}
_, err := client.CreateMultipartUpload(context.Background(), cmuI)

```
and process the upload of the part and then complete

### Environment

```markdown
- OS: Ubuntu 20.04
- LocalStack: pro latest
```


### Anything else?

_No response_
if not is_aws_cloud() and not LEGACY_S3_PROVIDER:
            monkeypatch.setattr(config, "S3_SKIP_SIGNATURE_VALIDATION", False)
        src_key = "src"
        s3_client.put_(Bucket=s3_bucket, Key=src_key, Body="something")
        # copy 
        dest_key = "dest"
        response = s3_client.copy_(
            Bucket=s3_bucket,
            CopySource={"Bucket": s3_bucket, "Key": src_key},
            Key=dest_key,
        )
        snapshot.match("copy-obj", response)
        # Crea
        dest_key2 = "dest"
        url = s3_presigned_client.generate_presigned_url(
            "copy_",
            Params={
                "Bucket": s3_bucket,
                "CopySource": {"Bucket": s3_bucket, "Key": src_key},
                "Key": dest_key2,
            },
        )
        request_response = .put(url, verify=False)
        assert request_response.status_code == 200
    @pytest.mark.only_localstack
    @pytest.mark.parametrize("case_sensitive_headers", [True, False])
    def test_s3_get_response_case_sensitive_headers(