### 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.
if (p_action_set.is_null()) {
		return String("None");
	}
	ActionSet *action_set = action_set_owner.get_or_null(p_action_set);
	ERR_FAIL_NULL_V(action_set, String());
	return action_set->name;
}
bool OpenXRAPI::attach_action_sets(const Vector<RID> &p_action_sets) {
	ERR_FAIL_COND_V(session == XR_NULL_HANDLE, false);
	Vector<XrActionSet> action_handles;
	action_handles.resize(p_action_sets.size());
	for (int i = 0; i < p_action_sets.size(); i++) {
		ActionSet *action_set = action_set_owner.get_or_null(p_action_sets[i]);
		ERR_FAIL_NULL_V(action_set, false);
		if (action_set->is_attached) {
			return false;
		}
		action_handles.set(i, action_set->handle);
	}
	
	
	XrSessionActionSetsAttachInfo attach_info = {
		XR_TYPE_SESSION_ACTION_SETS_ATTACH_INFO, 
		nullptr, 
		(uint32_t)p_action_sets.size(), 
		action_handles.ptr() 
	};