### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

There is an issue with `get-object-attributes` command which results in below error always: 
`aws --endpoint-url=http://localhost:4566 s3api get-object-attributes --bucket s3mock --key 20.txt --object-attributes "ObjectSize"`
````

> Response:  Unable to parse response (syntax error: line 1, column 0), invalid XML received. Further retries may succeed:
b'98\n5\n'
````

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

#### Using docker-compse.yaml to start localstack

docker-compse.yaml:

```
localstack:
    image: localstack/localstack:latest
    ports:
      - '4563-4599:4563-4599'
      - '8055:8080'
    environment:
      - SERVICES=s3
      - DEBUG=1
      - LS_LOG=error
      - DATA_DIR=/tmp/localstack/data
      - AWS_DEFAULT_REGION=eu-west-1
      # - EDGE_PORT=4566
    volumes:
      - "./.localstack:/tmp/localstack"
      - "/var/run/docker.sock:/var/run/docker.sock"
```

#### cli commands to reproduce the issue

1. Create a Bucket: `aws --endpoint-url=http://localhost:4566 s3 mb s3://s3mock`
2. Create an Object: `aws --endpoint-url=http://localhost:4566 s3 cp data/20.txt s3://s3mock`

File 20.txt content are 2-digit numbers separated by newline.

3. get-object-attributes for object 20.txt :
```

 aws --endpoint-url=http://localhost:4566 s3api get-object-attributes --bucket s3mock --key 20.txt --object-attributes "ObjectSize"

```
Results in error:

> Unable to parse response (syntax error: line 1, column 0), invalid XML received. Further retries may succeed:
b'98\n5\n'



### Environment

```markdown
- OS:Mac 12.x
- LocalStack:latest
- Node 14
```


### Anything else?

_No response_
"""
    Test to cover DEEP_ARCHIVE Storage Class functionality.
    """
    @pytest.mark.aws_validated
    def test_storage_class_deep_archive(self, s3_client, s3_resource, s3_bucket, tmpdir):
        key = "my-key"
        config = TransferConfig(multipart_threshold=5 * KB, multipart_chunksize=1 * KB)
        def upload_file(size_in_kb: int):
            file = tmpdir / f"test-file-{short_uid()}.bin"
            data = b"1" * (size_in_kb * KB)
            file.write(data=data, mode="w")
            s3_client.upload_file(
                Bucket=s3_bucket,
                Key=key,
                Filename=str(file.realpath()),
                ExtraArgs={"StorageClass": "DEEP_ARCHIVE"},
                Config=config,
            )
        upload_file(1)
        upload_file(9)
        upload_file(15)
        objects = s3_resource.Bucket(s3_bucket).objects.all()
        keys = []
        for obj in objects:
            keys.append(obj.key)
            assert obj.storage_class == "DEEP_ARCHIVE"