Litterrobot - Do not load a platform if there is no device supporting it (#77497)
Litterrobot - Do not load a platform if there is no device supporting it (#77497)

* Do not load button platform if no Litter Robot 3

* uno mas

* uno mas

* Do not load Vacuum if not needed

* Use dict to map platforms for each model

* uno mas
nkgilley/home-assistant,nkgilley/home-assistant,w1ll1am23/home-assistant,w1ll1am23/home-assistant,mezz64/home-assistant,mezz64/home-assistant