### 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.
ERR_FAIL_COND_V(session == XR_NULL_HANDLE, false);
	if (!running) {
		return false;
	}
	Vector<XrActiveActionSet> active_sets;
	for (int i = 0; i < p_active_sets.size(); i++) {
		ActionSet *action_set = action_set_owner.get_or_null(p_active_sets[i]);
		if (action_set && action_set->handle != XR_NULL_HANDLE) {
			XrActiveActionSet aset;
			aset.actionSet = action_set->handle;
			aset.subactionPath = XR_NULL_PATH;
			active_sets.push_back(aset);
		}
	}
	ERR_FAIL_COND_V(active_sets.size() == 0, false);
	XrActionsSyncInfo sync_info = {
		XR_TYPE_ACTIONS_SYNC_INFO, 
		nullptr, 
		uint32_t(active_sets.size()), 
		active_sets.ptr() 
	};
	XrResult result = xrSyncActions(session, &sync_info);
	if (XR_FAILED(result)) {
		print_line("OpenXR: failed to sync active action sets! [", get_error_string(result), "]");
		return false;
	}
	return true;
}
bool OpenXRAPI::get_action_bool(RID p_action, RID p_tracker) {