Trigger error on PHP 8.1

Error text: Deprecated: strpos(): Passing null to parameter 1 ($haystack) of type string is deprecated in Magento/Framework/Profiler/Driver/Standard/Stat.php:213

Author: vovayatsyuk

lib/internal/Magento/Framework/Profiler/Test/Unit/Driver/Standard/StatTest.php

@@ -238,6 +238,10 @@ public function timersSortingDataProvider()
                     ['start', 'root'],
                     ['start', 'root->init'],
                     ['start', 'root->system'],
+                    ['start', 'root->system->init_config'],
+                    ['stop', 'root->system->init_config'],
+                    ['start', 'root->system->init_store'],
+                    ['stop', 'root->system->init_store'],
                     ['stop', 'root->system'],
                     ['start', 'root->init->init_config'],
                     ['stop', 'root->init->init_config'],