Hi,

I am using below payload for PutBucketLogging api and getting MalformedXML error in response. I have checked it with real AWS and it is working perfectly fine. Am I missing something or this needs a fix in localstack?

`"LoggingEnabled": {
            "TargetBucket": "test_bucket_name",
            "TargetPrefix": "log",
            "TargetGrants": [
                {
                    "Grantee": {
                        "URI": "http://acs.amazonaws.com/groups/s3/LogDelivery",
                        "Type": "Group",
                    },
                    "Permission": "WRITE",
                },
                {
                    "Grantee": {
                        "URI": "http://acs.amazonaws.com/groups/s3/LogDelivery",
                        "Type": "Group",
                    },
                    "Permission": "READ_ACP",
                },
            ],
        }
 `
import moto.s3.models as moto_s3_models
    from moto.iam.access_control import PermissionResult
    from moto.s3.exceptions import InvalidObjectState
    if not os.environ.get("MOTO_S3_DEFAULT_KEY_BUFFER_SIZE"):
        os.environ["MOTO_S3_DEFAULT_KEY_BUFFER_SIZE"] = str(S3_MAX_FILE_SIZE_BYTES)
    
    moto_s3_models.STORAGE_CLASS.clear()
    moto_s3_models.STORAGE_CLASS.extend(s3_constants.VALID_STORAGE_CLASSES)
    @patch(moto_s3_responses.S3Response.key_response)
    def _fix_key_response(fn, self, *args, **kwargs):