Provide current file as file path

I failed to apply perfectly this comment:
#33820 (comment)
It should fix one failing test in the bridge.

src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/DeprecationTest.php

@@ -157,7 +157,7 @@ public function providerGetTypeDetectsSelf(): array
         }
 
         return [
-            'not_from_vendors_file' => [Deprecation::TYPE_SELF, '', 'MyClass1', ''],
+            'not_from_vendors_file' => [Deprecation::TYPE_SELF, '', 'MyClass1', __FILE__],
             'nonexistent_file' => [Deprecation::TYPE_UNDETERMINED, '', 'MyClass1', 'dummy_vendor_path'],
             'serialized_trace_with_nonexistent_triggering_file' => [
                 Deprecation::TYPE_UNDETERMINED,