Improve typing of deCONZ gateway (#69459)
Improve typing of deCONZ gateway (#69459)

* Improve typing of deCONZ gateway
* Fix review comments
toddeye/home-assistant,nkgilley/home-assistant,mezz64/home-assistant,toddeye/home-assistant,w1ll1am23/home-assistant,nkgilley/home-assistant,mezz64/home-assistant,w1ll1am23/home-assistant