ModuleInstaller::install() only checks for non-existent modules if $enable_dependencies is TRUE

Problem/Motivation

Early on, ModuleInstaller::install() has a check for sanity in the requested module list:

    $module_data = \Drupal::service('extension.list.module')->reset()->getList();
    foreach ($module_list as $module) {
      if (!empty($module_data[$module]->info['core_incompatible'])) {
        throw new MissingDependencyException("Unable to install modules: module '$module' is incompatible with this version of Drupal core.");
      }
  ETC

However, the check for a module that doesn't exist only happens if $enable_dependencies is TRUE:

    if ($enable_dependencies) {
      $module_list = $module_list ? array_combine($module_list, $module_list) : [];
      if ($missing_modules = array_diff_key($module_list, $module_data)) {
        // One or more of the given modules doesn't exist.
        throw new MissingDependencyException(sprintf('Unable to install modules %s due to missing modules %s.', implode(', ', $module_list), implode(', ', $missing_modules)));
      }

Steps to reproduce

Proposed resolution

Move the check to the earlier loop and convert it to an `isset($module_data[$module])

Remaining tasks

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet