### 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.
bucket_name = f"my-bucket-{short_uid()}"
        s3_create_bucket(
            Bucket=bucket_name,
            ACL="public-read",
            CreateBucketConfiguration={"LocationConstraint": "us-west-2"},
        )
        s3_vhost_client.list_s(Bucket=bucket_name)
        bucket_vhost_url = _bucket_url_vhost(bucket_name, region="us-west-2")
        response = .get(bucket_vhost_url)
        assert response.status_code == 200
        bucket_url = _bucket_url(bucket_name, region="us-west-2")
        response = .get(bucket_url)
        assert response.status_code == 200
        bucket_vhost_url = _bucket_url_vhost(bucket_name, region="us-east-2")
        response = .get(bucket_vhost_url)
        assert response.status_code == 301
        bucket_vhost_url = _bucket_url_vhost(bucket_name, region="us-east-1")
        response = .get(bucket_vhost_url)
        assert response.status_code == 200
        assert response.history[0].status_code == 307
    @pytest.mark.skip_snapshot_verify(
        condition=lambda: LEGACY_S3_PROVIDER, paths=["$..Error.RequestID"]
    )
    def test_bucket_does_not_exist(self, s3_vhost_client, snapshot, aws_client):