Core: Unable to reset utility_meter unless specifying tariff.

[cnrd]

Home Assistant release with the issue:

0.87.1

Last working Home Assistant release (if known):
Unknown

Operating environment (Hass.io/Docker/Windows/etc.):

Debian venv
Component/platform:

https://www.home-assistant.io/components/utility_meter/

Description of problem:
It is not possible to call the utility_meter.reset service on the sensors created by the component, this service can only be called on utility_meter.* entities.
As these entities are only created when using the tariff config option, it is not possible to reset the meter unless specifying at least one tariff.

Problem-relevant configuration.yaml entries and (fill out even if it seems unimportant):

# Not possible to reset.
utility_meter:
  energy:
    source: sensor.energy_in_kwh
    cycle: monthly

# Can be reset
utility_meter:
  energy:
    source: sensor.energy_in_kwh
    cycle: monthly
    tariffs:
      - option

Traceback (if applicable):

Additional information:
The sensors should either be changed to utility_meter type entities (preferred as they are part of that component) or it should be possible to call the utility_meter services on sensor entities.

[dgomes]

It was never supposed to be exposed

https://github.com/home-assistant/home-assistant/pull/20878

[imval]

The reset service should be exposed. The tariffs are not always needed.
In this case only the reset service should be available, the next tariff should not be available.