### 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_
_key = "test-presigned-post-key"
        body = (
            b"0" * 70_000
        )  # make 
        presigned_request = s3_client.generate_presigned_post(
            Bucket=s3_bucket,
            Key=_key,
            ExpiresIn=60,
            Conditions=[{"bucket": s3_bucket}],
        )
        # put 
        response = .post(
            presigned_request["url"],
            data=presigned_request["fields"],
            files={"file": body},
            verify=False,
        )
        assert response.status_code == 204
        # get 
        downloaded_ = s3_client.get_(Bucket=s3_bucket, Key=_key)
        assert downloaded_["Body"].read() == body
    @pytest.mark.aws_validated
    # old provider does not raise the right exception
    @pytest.mark.skip_snapshot_verify(condition=is_old_provider)
    def test_post_request_expires(self, s3_client, s3_bucket, snapshot):