Code Modernization: Rename parameters that use reserved keywords in wp-admin/includes/class-wp-site-health.php.

While using reserved PHP keywords as parameter name labels is allowed, in the context of function calls using named parameters in PHP 8.0+, this will easily lead to confusion. To avoid that, it is recommended not to use reserved keywords as function parameter names.

This commit:
* Renames the `$class` parameter to `$class_name` in `WP_Site_Health::test_php_extension_availability()`.
* Renames some other parameters for consistency.

Follow-up to [52946], [52996], [52997], [52998], [53003], [53014], [53029], [53039], [53116].

Props jrf, aristath, poena, justinahinon, SergeyBiryukov.
See #55327.
Built from https://develop.svn.wordpress.org/trunk@53117


git-svn-id: http://core.svn.wordpress.org/trunk@52706 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0-alpha-53116';
+$wp_version = '6.0-alpha-53117';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.