Rename passing cost functions

[akhilveeraghanta]

Description of the task

Cost functions generally imply that lower costs are better, but in the pass generator, maximizing the cost function results in the best pass.

This ticket involves changing the names to be more clear

https://en.wikipedia.org/wiki/Loss_function

couple names from that wikipedia article

• objective function
• reward function
• utility function
• profit function

Note that these might not apply to us, but we should be able to find a name that does.

Acceptance criteria

• [ ] Find a better term for "cost" functions in ai/passing
• [ ] Replace all instances in code/documentation involving passing

Blocked By

N/A

[akhilveeraghanta]

This need to be rethought, rather than renaming, we might want to flip everything to be 1 - so higher cost = worse pass