Nerfs Hydraulic Muscles

As requested in #6024.

Active muscles now emit 19 noise each turn (between bubblewrap and a car
horn) and cost two power every three turns.  (Twice as much as before.)

In practice, the Bionic Patient can power up to win a fight or schlep
something, but that's it.
Merge pull request #6027 from KA101/HMnerf

Nerfs Hydraulic Muscles