minor #32969 Use assertContainsEquals when needed (jderusse)

This PR was merged into the 3.4 branch.

Discussion
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Use assertContainsEquals when needed

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #32844
| License       | MIT
| Doc PR        | NA

This PR replaces deprecated paramèter `$checkForObjectIdentity` of methods `assertContains` by the dedicated method `assertContainsEquals`

Commits
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f842e59685 Use assert assertContainsEquals when needed

Author: nicolas-grekas

Tests/Compiler/MergeExtensionConfigurationPassTest.php

@@ -85,7 +85,7 @@ public function testExtensionConfigurationIsTrackedByDefault()
         $pass = new MergeExtensionConfigurationPass();
         $pass->process($container);
 
-        $this->assertContains(new FileResource(__FILE__), $container->getResources(), '', false, false);
+        $this->assertContainsEquals(new FileResource(__FILE__), $container->getResources());
     }
 
     public function testOverriddenEnvsAreMerged()