Templatable can_id

**Describe the problem you have/What new integration you would like**

the `can_id` field in CANBUS integration can not be tamplete for lambda or edited in runtime*
please make it templatable or some other way to be able to change it in runtime.

*except when you call `id(your_canbus_id).set_can_id(id(binary_sensor_map_sensor).state)` somewhere in lambda and change it that way
... or just document this "function" for future use as it compiles and works without errors.

**Please describe your use case for this integration and alternatives you've tried:**

one firmware for almost 50 standalone devices, all on same CANBUS, ID of the device is setup via DIP switches and binary sensor map integration. They communicate with IDs next to itself to make chain reactions.

**Additional context**