MDL-75484 lib: Set Moodle files after PHPSpreadSheet upgrade

lib/phpspreadsheet/readme_moodle.txt

@@ -71,7 +71,7 @@ STEPS:
  * Update lib/thirdpartylibs.xml
  * Apply the modifications described in the CHANGES section
  * Create another commit with the previous two steps of changes
- * Go to http://localhost/lib/tests/other/spreadsheettestpage.php and test the generated files
+ * Go to http://<your moodle root>/lib/tests/other/spreadsheettestpage.php and test the generated files
 
 
 CHANGES:

lib/phpspreadsheet/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/File.php

@@ -114,6 +114,12 @@ class File
      */
     public static function sysGetTempDir(): string
     {
+        // Moodle hack!
+        if (function_exists('make_temp_directory')) {
+            $temp = make_temp_directory('phpspreadsheet');
+            return realpath(dirname($temp));
+        }
+
         $path = sys_get_temp_dir();
         if (self::$useUploadTempDirectory) {
             //  use upload-directory when defined to allow running on environments having very restricted