### 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_
snapshot.add_transformer(self._get_presigned_snapshot_transformers(snapshot))
        # pres
        _key = "test-presigned-post-key"
        presigned_request = s3_client.generate_presigned_post(
            Bucket=s3_bucket, Key=_key, ExpiresIn=2
        )
        # slee
        time.sleep(3)
        # atte
        response = .post(
            presigned_request["url"],
            data=presigned_request["fields"],
            files={"file": "file content"},
            verify=False,
        )
        exception = xmltodict.parse(response.content)
        exception["StatusCode"] = response.status_code
        snapshot.match("exception", exception)
        assert response.status_code in [400, 403]
    @pytest.mark.only_localstack
    @pytest.mark.skipif(
        condition=LEGACY_S3_PROVIDER,
        reason="Legacy S3 provider does not skip the signature validation",
    )
    def test_get_request_expires_ignored_if_validation_disabled(