Pass both containers (drush-ops#5931)

Author: weitzman

Diff for: src/Commands/generate/GenerateCommands.php

@@ -111,7 +111,8 @@ public function generate(string $generator = '', $options = ['replace' => false,
     public function generatorNameComplete(CompletionInput $input, CompletionSuggestions $suggestions): void
     {
         if ($input->mustSuggestArgumentValuesFor('generator')) {
-            $application = (new ApplicationFactory($this->container, $this->logger()))->create();
+            $application = (new ApplicationFactory($this->container, $this->drush_container, $this->logger()))->create(
+            );
             foreach ($application->all() as $name => $command) {
                 if ($command->isEnabled() && !$command->isHidden()) {
                     $suggestions->suggestValue($name);