### 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.
OPENXR_SWAPCHAIN_COLOR,
		OPENXR_SWAPCHAIN_DEPTH,
		
		OPENXR_SWAPCHAIN_MAX
	};
	struct OpenXRSwapChainInfo {
		XrSwapchain swapchain = XR_NULL_HANDLE;
		void *swapchain_graphics_data = nullptr;
		uint32_t image_index = 0;
		bool image_acquired = false;
		bool skip_acquire_swapchain = false;
	};
	OpenXRSwapChainInfo swapchains[OPENXR_SWAPCHAIN_MAX];
	XrSpace play_space = XR_NULL_HANDLE;
	XrSpace view_space = XR_NULL_HANDLE;
	bool view_pose_valid = false;
	XRPose::TrackingConfidence head_pose_confidence = XRPose::XR_TRACKING_CONFIDENCE_NONE;
	bool load_layer_properties();
	bool load_supported_extensions();
	bool is_extension_supported(const String &p_extension) const;
	bool is_extension_enabled(const String &p_extension) const;
	bool openxr_loader_init();
	bool resolve_instance_openxr_symbols();
#ifdef ANDROID_ENABLED
	
	void *openxr_loader_library_handle = nullptr;
#endif