### 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.
self,
        context: RequestContext,
        request_route: RequestRoute,
        request_token: RequestToken,
        body: IO[Body] = None,
        status_code: GetObjectResponseStatusCode = None,
        error_code: ErrorCode = None,
        error_message: ErrorMessage = None,
        accept_ranges: AcceptRanges = None,
        cache_control: CacheControl = None,
        content_disposition: ContentDisposition = None,
        content_encoding: ContentEncoding = None,
        content_language: ContentLanguage = None,
        content_length: ContentLength = None,
        content_range: ContentRange = None,
        content_type: ContentType = None,
        checksum_crc32: ChecksumCRC32 = None,
        checksum_crc32_c: ChecksumCRC32C = None,
        checksum_sha1: ChecksumSHA1 = None,
        checksum_sha256: ChecksumSHA256 = None,