fix rotary hearth furnace parallel not taking energy discount into account

[Gregor0410]

…n calculating max parallel

What

The rotary hearth furnace does not take into account the energy discount from the coils when calculating the max parallel, causing the rotary hearth furnace to have a lower parallel count than expected in some cases.

Implementation Details

Recipe modifiers ebfDiscount and ebfOverclockOnly were created, and ebfOverclock changed to use these. The recipe modifiers for rotary hearth furnace was changed to ebfDiscount, then parallel hatch, then ebfOverclockOnly

Outcome

The rotary hearth furnace appears to have the correct behaviour now, further testing may be necessary

[Ghostipedia]

idk if this is the best choice.

I don't know if it's best not to unify this to EBF as well (vs leaving the old EBF overclock) but this is also a balancing concern, so I am unsure if we want to have this.

It comes down to if we want to allow substantially more parallels for RHF. And we're still undecided

Balance Concern, Nothing inherently wrong, needs further discussion externally