Upgrade/Install: Notify users of deactivated plugins during upgrade.

This adds a one-off notice to the dashboard in the event WordPress has automatically deactivated a plugin due to incompatibility with the new version of WordPress.

Introduces the new private function `deactivated_plugins_notice()` to display the notice in the dashboard. Introduces the new auto-loaded option `wp_force_deactivated_plugins` to store a list of automatically deactivated plugins; the option is used on both a site and network level.

Follow up to [51180].

Props desrosj, jorbin, azaozz, SergeyBiryukov, peterwilsoncc.
See #53432.



git-svn-id: https://develop.svn.wordpress.org/trunk@51266 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/schema.php

@@ -542,6 +542,9 @@ function populate_options( array $options = array() ) {
 		// Default to enabled for new installs.
 		// See https://core.trac.wordpress.org/ticket/51742.
 		'auto_update_core_major'          => 'enabled',
+
+		// 5.8.0
+		'wp_force_deactivated_plugins'    => array(),
 	);
 
 	// 3.3.0