Login and registration: Rename two filters related to language dropdown for better consistency.

This change renames two filters introduced in WP 5.9 development cycle. It replaces `display_login_language_dropdown` with `login_display_language_dropdown` and `wp_login_language_switcher_args` with `login_language_switcher_args`, for better consistency with the other existing `login_*` filters.

Props kebbet, mukesh27, audrasjb, Clorith, hellofromTonya.
Fixes #54696.

Built from https://develop.svn.wordpress.org/trunk@52432


git-svn-id: http://core.svn.wordpress.org/trunk@52024 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-beta4-52431';
+$wp_version = '5.9-beta4-52432';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

wp-login.php

@@ -321,7 +321,7 @@ function login_footer( $input_id = '' ) {
 		 *
 		 * @param bool Whether to display the Languages select input on the login screen.
 		 */
-		apply_filters( 'display_login_language_dropdown', true )
+		apply_filters( 'login_display_language_dropdown', true )
 	) {
 		$languages = get_available_languages();
 
@@ -352,7 +352,7 @@ function login_footer( $input_id = '' ) {
 					 *
 					 * @param array $args Arguments for the Languages select input on the login screen.
 					 */
-					wp_dropdown_languages( apply_filters( 'wp_login_language_switcher_args', $args ) );
+					wp_dropdown_languages( apply_filters( 'login_language_switcher_args', $args ) );
 					?>
 
 					<?php if ( $interim_login ) { ?>