### 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.
upload_file_ = BytesIO(part_data)
        with 
            aws_client.s3.upload_part(
                Bucket=s3_bucket,
                Key=key_name,
                Body=upload_file_,
                PartNumber=1,
                UploadId=upload_id,
                ChecksumAlgorithm="SHA256",
            )
        snapshot.match("upload-part-with-checksum", e.value.response)
        upload_resp = aws_client.s3.upload_part(
            Bucket=s3_bucket,
            Key=key_name,
            Body=upload_file_,
            PartNumber=1,
            UploadId=upload_id,
        )
        snapshot.match("upload-part-no-checksum-ok", upload_resp)
        with 
            aws_client.s3.complete_multipart_upload(
                Bucket=s3_bucket,
                Key=key_name,
                MultipartUpload={
                    "Parts": [
                        {
                            "ETag": upload_resp["ETag"],
                            "PartNumber": 1,
                            "ChecksumSHA256": checksum_part,