### 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.
Tracker *tracker = tracker_owner.get_or_null(p_tracker);
	ERR_FAIL_NULL(tracker);
	
	tracker_owner.free(p_tracker);
}
RID OpenXRAPI::action_set_create(const String p_name, const String p_localized_name, const int p_priority) {
	ERR_FAIL_COND_V(instance == XR_NULL_HANDLE, RID());
	ActionSet action_set;
	action_set.name = p_name;
	action_set.is_attached = false;
	
	XrActionSetCreateInfo action_set_info = {
		XR_TYPE_ACTION_SET_CREATE_INFO, 
		nullptr, 
		"", 
		"", 
		uint32_t(p_priority) 
	};
	copy_string_to_char_buffer(p_name, action_set_info.actionSetName, XR_MAX_ACTION_SET_NAME_SIZE);
	copy_string_to_char_buffer(p_localized_name, action_set_info.localizedActionSetName, XR_MAX_LOCALIZED_ACTION_SET_NAME_SIZE);
	XrResult result = xrCreateActionSet(instance, &action_set_info, &action_set.handle);
	if (XR_FAILED(result)) {
		print_line("OpenXR: failed to create action set ", p_name, "! [", get_error_string(result), "]");
		return RID();
	}
	return action_set_owner.make_rid(action_set);
}
String OpenXRAPI::action_set_get_name(RID p_action_set) {