MDL-74584 course: New optional parameter in get_module_types_names()

Adds new parameter in get_module_types_names() to optionally reset
the $modnames static cache.

course/lib.php

@@ -391,12 +391,13 @@ function course_integrity_check($courseid, $rawmods = null, $sections = null, $f
  * and the value is a lang_string object with a human-readable string.
  *
  * @param bool $plural If true, the function returns the plural forms of the names.
+ * @param bool $resetcache If true, the static cache will be reset
  * @return lang_string[] Localised human-readable names of all used modules.
  */
-function get_module_types_names($plural = false) {
+function get_module_types_names($plural = false, $resetcache = false) {
     static $modnames = null;
     global $DB, $CFG;
-    if ($modnames === null) {
+    if ($modnames === null || $resetcache) {
         $modnames = array(0 => array(), 1 => array());
         if ($allmods = $DB->get_records("modules")) {
             foreach ($allmods as $mod) {