Use strings instead of f-strings for constants (#40619)

homeassistant/components/accuweather/const.py

homeassistant/components/ambient_station/__init__.py

homeassistant/components/buienradar/sensor.py

homeassistant/components/comfoconnect/sensor.py

homeassistant/components/darksky/sensor.py

homeassistant/components/isy994/const.py

homeassistant/components/rfxtrx/__init__.py

homeassistant/components/tellduslive/sensor.py

homeassistant/components/zha/core/channels/smartenergy.py

homeassistant/const.py

tests/components/accuweather/test_sensor.py

tests/components/dsmr/test_sensor.py