Rename charging profile callbacks

[Pietfried]

OCPP Version

OCPP1.6, OCPP2.0.1

Describe the problem

Looking at how the signal_set_charging_profiles_callback and also set_charging_profiles_callback (of ocpp201) I would suggest to change the name of these variables to better represent their purpose. A libocpp user should get notified in case profiles are added / removed which leads to a change of the composite schedule. This can happen when charging profiles are added by SetChargingProfile.req but also when transactions stop (because TxProfiles) might be removed.

Describe your solution

A more appropriate name would e.g. be charging_profiles_updated_callback.

Additional context

No response