### 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.
part_data = to_bytes(part_data)
        parts = 3
        multipart_upload_parts = []
        for part in range(parts):
            
            part_number = part + 1
            upload_file_ = BytesIO(part_data)
            response = aws_client.s3.upload_part(
                Bucket=s3_bucket,
                Key=key_name,
                Body=upload_file_,
                PartNumber=part_number,
                UploadId=upload_id,
                ChecksumAlgorithm="SHA256",
            )
            snapshot.match(f"upload-part-{part}", response)
            multipart_upload_parts.append(
                {
                    "ETag": response["ETag"],
                    "PartNumber": part_number,
                    "ChecksumSHA256": response["ChecksumSHA256"],
                }
            )
        response = aws_client.s3.list_parts(Bucket=s3_bucket, Key=key_name, UploadId=upload_id)
        snapshot.match("list-parts", response)
        # test
        multipart_upload_parts_no_checksum = [
            {"ETag": upload_part["ETag"], "PartNumber": upload_part["PartNumber"]}
            for upload_part in multipart_upload_parts
        ]