minor #32215 [HttpFoundation] Throw exception when the "session" extension is not loaded (vudaltsov)

This PR was squashed before being merged into the 3.4 branch (closes #32215).

Discussion
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[HttpFoundation] Throw exception when the "session" extension is not loaded

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #31305
| License       | MIT

Should I target `3.4` or `master` instead? This change does not alter behavior, but makes the failure more clear.

Commits
-------

b0c663071b [HttpFoundation] Throw exception when the \"session\" extension is not loaded

Author: nicolas-grekas

DependencyInjection/FrameworkExtension.php

@@ -233,6 +233,10 @@ public function load(array $configs, ContainerBuilder $container)
         }
 
         if ($this->isConfigEnabled($container, $config['session'])) {
+            if (!\extension_loaded('session')) {
+                throw new \LogicException('PHP extension "session" is required.');
+            }
+
             $this->sessionConfigEnabled = true;
             $this->registerSessionConfiguration($config['session'], $container, $loader);
         }