### 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.
switch (action->action_type) {
			case OpenXRAction::OPENXR_ACTION_BOOL: {
				bool pressed = openxr_api->get_action_bool(action->action_rid, p_tracker->tracker_rid);
				p_tracker->positional_tracker->set_input(action->action_name, Variant(pressed));
			} break;
			case OpenXRAction::OPENXR_ACTION_FLOAT: {
				real_t value = openxr_api->get_action_float(action->action_rid, p_tracker->tracker_rid);
				p_tracker->positional_tracker->set_input(action->action_name, Variant(value));
			} break;
			case OpenXRAction::OPENXR_ACTION_VECTOR2: {
				Vector2 value = openxr_api->get_action_vector2(action->action_rid, p_tracker->tracker_rid);
				p_tracker->positional_tracker->set_input(action->action_name, Variant(value));
			} break;
			case OpenXRAction::OPENXR_ACTION_POSE: {
				Transform3D transform;
				Vector3 linear, angular;
				XRPose::TrackingConfidence confidence = openxr_api->get_action_pose(action->action_rid, p_tracker->tracker_rid, transform, linear, angular);
				if (confidence != XRPose::XR_TRACKING_CONFIDENCE_NONE) {
					p_tracker->positional_tracker->set_pose(action->action_name, transform, linear, angular, confidence);
				} else {
					p_tracker->positional_tracker->invalidate_pose(action->action_name);
				}
			} break;
			default: {
				
			} break;
		}
	}
}
void OpenXRInterface::trigger_haptic_pulse(const String &p_action_name, const StringName &p_tracker_name, double p_frequency, double p_amplitude, double p_duration_sec, double p_delay_sec) {