### 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.
Tracker *tracker = nullptr;
	for (int i = 0; i < trackers.size() && tracker == nullptr; i++) {
		if (trackers[i]->tracker_rid == p_tracker) {
			tracker = trackers[i];
		}
	}
	ERR_FAIL_NULL(tracker);
	tracker->interaction_profile = p_interaction_profile;
	if (p_interaction_profile.is_null()) {
		print_verbose("OpenXR: Interaction profile for " + tracker->tracker_name + " changed to " + INTERACTION_PROFILE_NONE);
		tracker->positional_tracker->set_tracker_profile(INTERACTION_PROFILE_NONE);
	} else {
		String name = openxr_api->interaction_profile_get_name(p_interaction_profile);
		print_verbose("OpenXR: Interaction profile for " + tracker->tracker_name + " changed to " + name);
		tracker->positional_tracker->set_tracker_profile(name);
	}
}
void OpenXRInterface::handle_tracker(Tracker *p_tracker) {