### 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 (openxr_api == nullptr) {
		return false;
	} else if (!openxr_api->is_initialized()) {
		return false;
	} else {
		OpenXREyeGazeInteractionExtension *eye_gaze_ext = OpenXREyeGazeInteractionExtension::get_singleton();
		if (eye_gaze_ext == nullptr) {
			return false;
		} else {
			return eye_gaze_ext->supports_eye_gaze_interaction();
		}
	}
}
bool OpenXRInterface::is_action_set_active(const String &p_action_set) const {
	for (ActionSet *action_set : action_sets) {
		if (action_set->action_set_name == p_action_set) {
			return action_set->is_active;
		}
	}
	WARN_PRINT("OpenXR: Unknown action set " + p_action_set);
	return false;
}
void OpenXRInterface::set_action_set_active(const String &p_action_set, bool p_active) {