bug symfony#61401 [Process] Enhance hasSystemCallBeenInterrupted function for non-english locale (christianseel)

This PR was squashed before being merged into the 6.4 branch.

Discussion
----------

[Process] Enhance hasSystemCallBeenInterrupted function for non-english locale

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | Related: PHPMailer/PHPMailer#3183
| License       | MIT

We've been facing an issue with PHPMailer (PHPMailer/PHPMailer#3183) where `stream_select()` returns false, but because our application uses `setlocale(LC_ALL, 'de_DE.UTF-8')`, the PHP warning does **NOT** contain the string `'interrupted system call'` which results in unexpected behavior (no retry happening).

We did found a fix for this: PHPMailer/PHPMailer#3193

> I received a great hint by `@teefax` – who pointed out that the stream_select(): Unable to select part of the php warning message is not translated for other locales. Only the interrupted system call part is translated.
>
> That Unable to select is followed by an error number in square brackets. However that number can be different based on the operating system of the server. But PHP has a constant [SOCKET_EINTR](https://www.php.net/manual/en/sockets.constants.php#constant.socket-eintr) for that.
>
> So the recommendation is to check for the SOCKET_EINTR constant which is defined under Windows and UNIX-like platforms (if available on the platform) and use that with the other english warning text to catch those interrupted system calls for non-english locale applications.
>
> I left the existing check to avoid any potential unknown breaking change and extended the if-condition.

As I known Symfony was using a similar approach, I'm recommending to apply this enhancement to the "interrupted check" as well.

Commits
-------

013126d [Process] Enhance hasSystemCallBeenInterrupted function for non-english locale

Author: nicolas-grekas

src/Symfony/Component/Process/Pipes/AbstractPipes.php

@@ -52,14 +52,26 @@ public function close(): void
 
     /**
      * Returns true if a system call has been interrupted.
+     *
+     * stream_select() returns false when the `select` system call is interrupted by an incoming signal.
      */
     protected function hasSystemCallBeenInterrupted(): bool
     {
         $lastError = $this->lastError;
         $this->lastError = null;
 
-        // stream_select returns false when the `select` system call is interrupted by an incoming signal
-        return null !== $lastError && false !== stripos($lastError, 'interrupted system call');
+        if (null === $lastError) {
+            return false;
+        }
+
+        if (false !== stripos($lastError, 'interrupted system call')) {
+            return true;
+        }
+
+        // on applications with a different locale than english, the message above is not found because
+        // it's translated. So we also check for the SOCKET_EINTR constant which is defined under
+        // Windows and UNIX-like platforms (if available on the platform).
+        return \defined('SOCKET_EINTR') && str_starts_with($lastError, 'stream_select(): Unable to select ['.\SOCKET_EINTR.']');
     }
 
     /**