### 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.
if (XR_SUCCEEDED(result))
		return true;
	char resultString[XR_MAX_RESULT_STRING_SIZE];
	xrResultToString(instance, result, resultString);
	print_error(String("OpenXR ") + String(format).format(args) + String(" [") + String(resultString) + String("]"));
	return false;
}
RID OpenXRAPI::get_tracker_rid(XrPath p_path) {
	List<RID> current;
	tracker_owner.get_owned_list(&current);
	for (int i = 0; i < current.size(); i++) {
		Tracker *tracker = tracker_owner.get_or_null(current[i]);
		if (tracker && tracker->toplevel_path == p_path) {
			return current[i];
		}
	}
	return RID();
}
RID OpenXRAPI::tracker_create(const String p_name) {