bug symfony#50582 [Security/Http] Fix false-string handling in RememberMeAuthenticator (ossinkine)

This PR was merged into the 5.4 branch.

Discussion
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[Security/Http] Fix false-string handling in `RememberMeAuthenticator`

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

I found some errors "No remember-me cookie is found." in my logs. I didn't find another way to reproduce it other than set "false-string" to the cookie value, for example `0`.
This PR fixes this.

Commits
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87c2bc2 [Security] Fix false-string handling in RememberMeAuthenticator

Author: nicolas-grekas

src/Symfony/Component/Security/Http/Authenticator/RememberMeAuthenticator.php

@@ -70,7 +70,7 @@ public function supports(Request $request): ?bool
             return false;
         }
 
-        if (!$request->cookies->has($this->cookieName)) {
+        if (!$request->cookies->has($this->cookieName) || !\is_scalar($request->cookies->all()[$this->cookieName] ?: null)) {
             return false;
         }
 

src/Symfony/Component/Security/Http/Tests/Authenticator/RememberMeAuthenticatorTest.php

@@ -61,6 +61,9 @@ public static function provideSupportsData()
         $request = Request::create('/', 'GET', [], ['_remember_me_cookie' => 'rememberme']);
         $request->attributes->set(ResponseListener::COOKIE_ATTR_NAME, new Cookie('_remember_me_cookie', null));
         yield [$request, false];
+
+        $request = Request::create('/', 'GET', [], ['_remember_me_cookie' => '0']);
+        yield [$request, false];
     }
 
     public function testAuthenticate()