[mqtt.homeassistant] Mark disabled by default components as advanced channels (#14240)

[mqtt.homeassistant] Mark disabled by default components as advanced channels (#14240)

openHAB doesn't have the concept of "enabled by default", since _everything_
is technically "disabled" until you link it to an item. It seems devices
use disabled by default on less common entities, such as zigbee2mqtt
marking a binary_sensor as a "backup" method to an update entity for
when an update is available, or a sensor as a "backup" method to a
select entity. So in that case, just hiding these channels unless the user
clicks "Show Advanced" seems to map best.

Signed-off-by: Cody Cutrer <cody@cutrer.us>