Alternator voltage target table

[ElDominio]

**Is your feature request related to a problem?
I'm always frustrated when I want to lower voltage under different conditions but cannot because voltage target is one value

Would we need new configuration fields?
Chnge single voltage target value to a 4x4 table

Describe the solution you'd like
Chnge single voltage target value to a 4x4 table

Describe alternatives you've considered
Stay with a single target voltage which is. Abit sad

Additional context
Under high engine loads, it's good to lower target voltage to free up some torque, and in cruising conditions we can target slightly higher voltages for battery life