### 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.
snapshot.add_transformer(snapshot.transform.s3_api())
        snapshot.add_transformer(snapshot.transform.key_value("Date", reference_replacement=False))
        snapshot.add_transformer(snapshot.transform.key_value("date", reference_replacement=False))
        snapshot.add_transformer(
            snapshot.transform.key_value("x-amz-id-2", reference_replacement=False)
        )
        snapshot.add_transformer(
            snapshot.transform.key_value("x-amz-request-id", reference_replacement=False)
        )
        bucket_name = f"my.bucket.name.{short_uid()}"
        s3_create_bucket(Bucket=bucket_name, ACL="public-read")
        aws_client.s3.put_(Bucket=bucket_name, Key="my-content", Body="something")
        response = aws_client.s3.list_s(Bucket=bucket_name)
        assert response["Contents"][0]["Key"] == "my-content"
        assert response["Contents"][0]["ETag"] == '"437b930db84b8079c2dd804a71936b5f"'
        assert response["Contents"][0]["Size"] == 9
        snapshot.match("list_s", response)