Fixes #4758

Fixed issue where removing the power cell would prevent certain checks
on robot components. Also cleaned up
/mob/living/silicon/robot/proc/use_power(), moved code related to status
for better SRP. Added a line to the examine text to hint that the borg
can still move without power.
Sorry for all of this being in a single commit, things got screwed up
with git.
Reverted energy_consumption value

Reverted energy_consumption value for
/datum/robot_component/binary_communication to 0.
Merge pull request #4763 from mwerezak/actuator

Fixes #4758