Allow quirks v2 sensors/platforms to provide a lambda for parsing state

[TheJulianJES]

We should consider providing a way that lets v2 quirks provide a lambda to allow ZHA to parse ZCL attribute state to a different HA state with the parsing being in the v2 quirk.

This should be implemented for at least binary sensors and normal/analog sensors.

We may also want to consider the other platforms.
Switch currently has a special force_inverted, invert_attribute_name implementation.

[TheJulianJES]

Some helpers in zha-quirks tests would also be needed, so we can actually test the "attribute converters" in zha-quirks.

[puddly]

This may help clean up all of the _attribute_updated overrides too. These end up in the zigpy attribute cache and are persisted to disk in a modified form.

[TheJulianJES]

This is implemented for binary sensors and (analog) sensors with #360 and zigpy/zigpy#1540.
Closing this for now. If this is also needed for other platforms, please create a new isuse.