Fix Moodle 5.1+ compatibility for course request form

[weilai-irl]

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[Copilot]

Pull request overview

This PR fixes Moodle 5.1+ compatibility for the course request form by adapting to the relocation of the core course request form class in Moodle 5.1. In Moodle 5.1+, the course request form was moved from course/request_form.php (class course_request_form) to course/classes/form/request_course.php (class \core_course\form\request_course). The solution uses a file-existence check and class aliasing to maintain backward compatibility with pre-5.1 Moodle versions while supporting the new structure.

Changes:

• Implements version-agnostic compatibility using file_exists() checks to detect which Moodle version is in use
• Uses class_alias to create a common parent class reference (parent_request_course) regardless of Moodle version
• Updates the class inheritance to extend the aliased parent class instead of directly extending course_request_form

Comments suppressed due to low confidence (1)

local/o365/classes/form/courserequestform.php:31

• Consider using more descriptive variable names for clarity. The current names $pathbelowmoodle51 and $pathsincemoodle51 could be improved to something like $legacypath and $modernpath, or $pathpre51 and $pathfrom51, which would be more intuitive and easier to understand at a glance.

$pathbelowmoodle51 = $CFG->dirroot . '/course/request_form.php';
$pathsincemoodle51 = $CFG->dirroot . '/course/classes/form/request_course.php';

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