REST API: Improve the rest_*_collection_params filter docs and fix the terms filter.

The `rest_{$taxonomy}_collection_params` filter in 4.7 is incorrectly using
single quotes instead of double quotes, which means it is not working correctly
as a dynamic filter.  This fixes the quotes around the filter name, and also
updates the docblocks for the other 3 similar filters for better conformance to
the documentation standards.

Props shazahm1hotmailcom, JPry, jnylen0.
Fixes #39300.

Built from https://develop.svn.wordpress.org/trunk@39621


git-svn-id: http://core.svn.wordpress.org/trunk@39561 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php

@@ -1351,7 +1351,7 @@ class WP_REST_Users_Controller extends WP_REST_Controller {
 		 *
 		 * @since 4.7.0
 		 *
-		 * @param $params JSON Schema-formatted collection parameters.
+		 * @param array $query_params JSON Schema-formatted collection parameters.
 		 */
 		return apply_filters( 'rest_user_collection_params', $query_params );
 	}