[BUG] [php-symfony] Response Content for Status-Codes >= 300 ignored

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Bounty to sponsor the fix (example)

Description

When returning a Status code above 300 the result won't be sent to the user in the request body although explicitly stated in the *.yaml file used for generation

openapi-generator version

4.2.3

OpenAPI declaration file content or url

Minimized yaml file can be found here: https://gist.github.com/dmetzner/3b5d2e3f1ce637a618d932563dc5cbcb

Command line used for generation

java -jar ../openapi-generator-cli.jar generate \
-i testing.yaml \
-g php-symfony \
-p sortParamsByRequiredFlag=true \
-p skipFormModel=true \
-p variableNamingConvention=camelCase \
-p phpLegacySupport=false

Steps to reproduce

Just generating with the given yaml file, and looking directly in ./Controller/UserController.php.
At the end of the function you should see something like this:

$result = $handler->userPost($inlineObject, $responseCode, $responseHeaders);
// Find default response message
$message = 'User successfully registered.';
// Find a more specific message, if available
switch ($responseCode) {
    case 201:
        $message = 'User successfully registered.';
        break;
    case 400:
        $message = 'BAD Request - invalid or missing required parameters';
        break;
    case 415:
        $message = 'Unsupported Media Type - request must use application/json as content type';
        break;
    case 422:
        $message = 'Unprocessable Entity';
        break;
}
return new Response(
    '',
    $responseCode,
    array_merge(
        $responseHeaders,
        [
            'X-OpenAPI-Message' => $message
        ]
    )
);

As you can see result is simply ignored.

Related issues/PRs

Not to my knowledge no.

Suggest a fix

It should look like a response from a 200 Status code like this:

return new Response(
    $result !== null ?$this->serialize($result, $responseFormat):'',
    $responseCode,
    array_merge(
        $responseHeaders,
        [
            'Content-Type' => $responseFormat,
            'X-OpenAPI-Message' => $message
        ]
    )
);

Start with the minimized YAML declaration and run the shown OpenAPI Generator command for php-symfony. Inspect the generated ./Controller/UserController.php, especially the response returned for status codes 300 and above. Done means the generated response includes the serialized result, status code, headers, and message for those responses.