### Godot version

4.2.dev 80de898d721f952dac0b102d48bb73d6b02ee1e8

### System information

OpenXR

### Issue description

The Godot 3 OpenXR plugin supported obtaining boundary/guardian information in order to obtain play space logic. While we do have a function in the `XRInterface` in Godot 4 that is supposed to retrieve this information (`get_play_area`) it is not implemented on the Godot 4 `OpenXRInterface`.

This logic needs to be ported.

### Steps to reproduce

Call `get_play_area`, be amazed by it not returning data :P

### Minimal reproduction project

Any XR project.
ERR_FAIL_COND_V(instance == XR_NULL_HANDLE, RID());
	Tracker new_tracker;
	new_tracker.name = p_name;
	new_tracker.toplevel_path = XR_NULL_PATH;
	new_tracker.active_profile_rid = RID();
	XrResult result = xrStringToPath(instance, p_name.utf8().get_data(), &new_tracker.toplevel_path);
	if (XR_FAILED(result)) {
		print_line("OpenXR: failed to get path for ", p_name, "! [", get_error_string(result), "]");
		return RID();
	}
	return tracker_owner.make_rid(new_tracker);
}
String OpenXRAPI::tracker_get_name(RID p_tracker) {
	if (p_tracker.is_null()) {
		return String("None");
	}
	Tracker *tracker = tracker_owner.get_or_null(p_tracker);
	ERR_FAIL_NULL_V(tracker, String());
	return tracker->name;
}
void OpenXRAPI::tracker_check_profile(RID p_tracker, XrSession p_session) {