[ErrorHandler] Avoid calling xdebug_get_function_stack() in xdebug >= 3.0 when not in develop mode#40787

ralphschindler wants to merge 2 commits intosymfony:5.2symfony/symfony:5.2from

ralphschindler:5.2-fix-xdebug-during-debug-moderalphschindler/symfony:5.2-fix-xdebug-during-debug-modeCopy head branch name to clipboard