### 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.
}
	}
	XrCompositionLayerFlags layer_flags = XR_COMPOSITION_LAYER_CORRECT_CHROMATIC_ABERRATION_BIT;
	if (layers_list.size() > 0 || environment_blend_mode != XR_ENVIRONMENT_BLEND_MODE_OPAQUE) {
		layer_flags |= XR_COMPOSITION_LAYER_BLEND_TEXTURE_SOURCE_ALPHA_BIT;
	}
	XrCompositionLayerProjection projection_layer = {
		XR_TYPE_COMPOSITION_LAYER_PROJECTION, 
		nullptr, 
		layer_flags, 
		play_space, 
		view_count, 
		projection_views, 
	};
	layers_list.push_back((const XrCompositionLayerBaseHeader *)&projection_layer);
	XrFrameEndInfo frame_end_info = {
		XR_TYPE_FRAME_END_INFO, 
		nullptr, 
		frame_state.predictedDisplayTime, 
		environment_blend_mode, 
		static_cast<uint32_t>(layers_list.size()), 
		layers_list.ptr() 
	};
	result = xrEndFrame(session, &frame_end_info);
	if (XR_FAILED(result)) {
		print_line("OpenXR: failed to end frame! [", get_error_string(result), "]");
		return;
	}
}
float OpenXRAPI::get_display_refresh_rate() const {