hook_install, hook_uninstall, hook_modules_installed and hook_modules_uninstalled now receive an $is_syncing parameter

Prior to 8.9.0, module authors needed to check the config installer to see if config was being synced when their hook_install, hook_uninstall, hook_modules_installed and hook_modules_uninstalled was being called.

To make it easier to check the config installer syncing status, an $is_syncing parameter is now passed to these hooks.

The value of $is_syncing will be TRUE when a module is being installed/uninstalled as part of a configuration import. In these cases, your hook implementation needs to carefully consider what changes, if any, it should make. For example, it should not make any changes to configuration objects or entities.

e.g. from demo_umami_content module

Before

/**
 * Implements hook_install().
 */
function demo_umami_content_install() {
  if (!\Drupal::service('config.installer')->isSyncing()) {
    \Drupal::classResolver(InstallHelper::class)->importContent();
  }
}

After

/**
 * Implements hook_install().
 */
function demo_umami_content_install($is_syncing) {
  if (!$is_syncing) {
    \Drupal::classResolver(InstallHelper::class)->importContent();
  }
}