### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

The Complete Multipart Upload operation generates the **InternalError** error for non-existing uploads.

### Expected Behavior

The Complete Multipart Upload operation generates the **NoSuchUpload** error for non-existing uploads.

### How are you starting LocalStack?

With a `docker run` command

### Steps To Reproduce

    docker run -it --rm -p 4566:4566 localstack/localstack

    aws s3api create-bucket --bucket test --endpoint-url http://localhost:4566 --create-bucket-configuration LocationConstraint=us-west-2

    aws s3api complete-multipart-upload --bucket test --endpoint-url http://localhost:4566 --key test --upload-id test

### Environment

```markdown
- OS: Windows 11
- LocalStack: latest
```


### Anything else?

The Abort Multipart Upload operation works correctly in LocalStack.

The official documentation: https://docs.aws.amazon.com/AmazonS3/latest/API/API_CompleteMultipartUpload.html
Amazon S3 throws the correct **NoSuchUpload** error for both Abort and Complete operations.
PartNumber=1,
            UploadId=upload_id,
        )
        snapshot.match(f"{snapshot_prefix}-upload-part", response)
        response = aws_client.s3.complete_multipart_upload(
            Bucket=bucket,
            Key=key,
            MultipartUpload={"Parts": [{"ETag": response["ETag"], "PartNumber": 1}]},
            UploadId=upload_id,
        )
        snapshot.match(f"{snapshot_prefix}-compete-multipart", response)
        return response
    return perform_multipart_upload
@pytest.fixture
def create_tmp_folder_lambda():
    cleanup_folders = []
    def prepare_folder(path_to_lambda, run_command=None):
        tmp_dir = tempfile.mkdtemp()
        shutil.copy(path_to_lambda, tmp_dir)
        if run_command:
            run(f"cd {tmp_dir}; {run_command}")
        cleanup_folders.append(tmp_dir)
        return tmp_dir
    yield prepare_folder
    for folder in cleanup_folders:
        try:
            shutil.rmtree(folder)
        except Exception:
            LOG.warning(f"could not delete folder {folder}")
def _filter_header(param: dict) -> dict: