bug symfony#58327 [FrameworkBundle] Do not access the container when the kernel is shut down (jderusse)

This PR was merged into the 5.4 branch.

Discussion
----------

[FrameworkBundle] Do not access the container when the kernel is shut down

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

symfony#58240 play with the container after the kernel was shut down.
This is an issue when the kernel performs a cleanup operation. For instance, the `@Nyholm` TestBundle [deletes cache files](https://github.com/SymfonyTest/symfony-bundle-test/blob/241bf0e2f00f28f7327113570ab20e24a5828829/src/TestKernel.php#L184-L199) as a result, the service is not accessible anymore and triggers errors.

This PR move the call to `container->get` before `kernel::shutdown`

Commits
-------

e68f88c [FrameworkBundle] Do not access the container when the kernel is shut down

Author: xabbuh

src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php

@@ -157,14 +157,15 @@ protected static function ensureKernelShutdown()
         if (null !== static::$kernel) {
             static::$kernel->boot();
             $container = static::$kernel->getContainer();
-            static::$kernel->shutdown();
-            static::$booted = false;
 
             if ($container->has('services_resetter')) {
                 // Instantiate the service because Container::reset() only resets services that have been used
                 $container->get('services_resetter');
             }
 
+            static::$kernel->shutdown();
+            static::$booted = false;
+
             if ($container instanceof ResetInterface) {
                 $container->reset();
             }