minor #41575 [Config] Add parameter types (derrabus)

This PR was merged into the 6.0 branch.

Discussion
----------

[Config] Add parameter types

| Q             | A
| ------------- | ---
| Branch?       | 6.0
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | Part of #41424
| License       | MIT
| Doc PR        | N/A

This PR adds parameter types to all methods of the Config component.

Commits
-------

e7e5256438 [Config] Add parameter types

Author: nicolas-grekas

Tests/Loader/GlobFileLoaderTest.php

@@ -38,7 +38,7 @@ public function testLoadAddsTheGlobResourceToTheContainer()
 
 class GlobFileLoaderWithoutImport extends GlobFileLoader
 {
-    public function import($resource, string $type = null, bool $ignoreErrors = false, string $sourceResource = null, $exclude = null)
+    public function import(mixed $resource, string $type = null, bool $ignoreErrors = false, string $sourceResource = null, $exclude = null)
     {
         return new RouteCollection();
     }

Tests/Loader/ObjectLoaderTest.php

@@ -98,7 +98,7 @@ class TestObjectLoader extends ObjectLoader
 {
     public $loaderMap = [];
 
-    public function supports($resource, string $type = null): bool
+    public function supports(mixed $resource, string $type = null): bool
     {
         return 'service';
     }