### 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.
assert 404 == response.status_code
        assert "error" == response.text
        assert "content-type" in response.headers
        assert "text/html" in response.headers["content-type"]
        assert "etag" in response.headers
        assert error_obj["ETag"] == response.headers["etag"]
        # erro
        url = f"{website_url}/something"
        response = .get(url, verify=False)
        assert 404 == response.status_code
        assert "error" == response.text
        assert "content-type" in response.headers
        assert "text/html" in response.headers["content-type"]
        assert "etag" in response.headers
        assert error_obj["ETag"] == response.headers["etag"]
        # redi
        url = f"{website_url}/to-be-redirected.html"
        response = .get(url, verify=False, allow_redirects=False)
        assert 301 == response.status_code
        assert "location" in response.headers
        assert "actual/key.html" in response.headers["location"]
        response = .get(url, verify=False)
        assert response.status_code == 200
        assert response.headers["etag"] == actual_key_obj["ETag"]
    @pytest.mark.aws_validated
    @pytest.mark.skipif(
        condition=LEGACY_S3_PROVIDER and not is_aws_cloud(),
        reason="Legacy S3 provider does not provide proper website support",
    )
    def test_website_hosting_no_such_website(self, s3_create_bucket, snapshot, aws_client):