[HttpClient] Memory leak in CurlHttpClient

[HypeMC]

Symfony version(s) affected: 4.4

Description
The CurlHttpClient has a memory leak which seems to have been caused by this PR #35674 .
When an exception occurs the CurlResponse::close method never gets called from __destruct cause of the PR & the handler never gets unset from the CurlClientState::$openHandles & CurlClientState::$handlesActivity arrays. Over time this leads to a lot of handlers piling up in the memory, causing a memory leak. I've notice this while using the HttpClient in a Messenger handler.

How to reproduce

class MyMessageHandler implements MessageHandlerInterface
{
    //...

    public function doSomething(MyMessage $myMessage): void
    {
        //...
        try {
            $this->httpClient->request(/*...*/);
        } catch (HttpExceptionInterface $e) {
            //...
        }
    }
}

Additional context

[Nyholm]

I can confirm that symfony/http-client: 4.4.15 and 5.x-dev has this issue.

<?php

use Symfony\Component\HttpClient\CurlHttpClient;

include __DIR__.'/vendor/autoload.php';

$client = new CurlHttpClient();

$start = 0;
for($i=0; $i<20; $i++) {
    try {
        $client->request('POST', 'https://example.com/foo');
    } catch (\Throwable $exception) {

    }

    if ($i === 5) {
        $start = memory_get_usage();
    }
}
$end = memory_get_usage();

if ($start < $end) {
    echo 'MEMORY LEAK!!'. PHP_EOL;
}

echo 'Start:', $start / 1024 / 1024, PHP_EOL;
echo 'End:', $end / 1024 / 1024, PHP_EOL;