### 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.
Vector<Action *> actions; 
		Ref<XRPositionalTracker> positional_tracker; 
		RID tracker_rid; 
		RID interaction_profile; 
	};
	Vector<ActionSet *> action_sets;
	Vector<RID> interaction_profiles;
	Vector<Tracker *> trackers;
	ActionSet *create_action_set(const String &p_action_set_name, const String &p_localized_name, const int p_priority);
	void free_action_sets();
	Action *create_action(ActionSet *p_action_set, const String &p_action_name, const String &p_localized_name, OpenXRAction::ActionType p_action_type, const Vector<Tracker *> p_trackers);
	Action *find_action(const String &p_action_name);
	void free_actions(ActionSet *p_action_set);
	Tracker *find_tracker(const String &p_tracker_name, bool p_create = false);
	void handle_tracker(Tracker *p_tracker);
	void free_trackers();
	void free_interaction_profiles();
	void _set_default_pos(Transform3D &p_transform, double p_world_scale, uint64_t p_eye);
	void handle_hand_tracking(const String &p_path, OpenXRHandTrackingExtension::HandTrackedHands p_hand);
protected:
	static void _bind_methods();
public:
	virtual StringName get_name() const override;
	virtual uint32_t get_capabilities() const override;
	virtual PackedStringArray get_suggested_tracker_names() const override;
	virtual TrackingStatus get_tracking_status() const override;
	bool is_hand_tracking_supported();
	bool is_eye_gaze_interaction_supported();
	bool initialize_on_startup() const;
	virtual bool is_initialized() const override;