Improve hold event for Aqara Opple WXCJKG13LM to distinguish which button was held

[nununo]

Hello,

The Opple WXCJKG13LM has 6 buttons. It has specific events per button for single, double, triple clicks and release. But for some strange reason, the hold event is common to all the 6 buttons. This is reported here.

And yet, we still get an attribute with the button: button_X information. As such it is still possible to distinguish which button actually triggered the hold event.

I propose we try to improve the Blueprint to distinguish between the 6 holds.