ENGCOM-4223: Make the module list more deterministic #21020

 - Merge Pull Request #21020 from ajardin/magento2:2.3-develop
 - Merged commits:
   1. 7b9c605
   2. 78916b3

Author: magento-engcom-team

lib/internal/Magento/Framework/Module/ModuleList/Loader.php

@@ -134,7 +134,7 @@ private function sortBySequence(array $origList): array
         $modules = $this->prearrangeModules($origList);
 
         $expanded = [];
-        foreach ($modules as $moduleName => $value) {
+        foreach (array_keys($modules) as $moduleName) {
             $sequence = $this->expandSequence($origList, $moduleName);
             asort($sequence);