WeaponMounted.getBayWeapons() iterates through the entire bay before
returning, which isn't always necessary. It has been refactored to allow
for the stream to be used directly.

Another contributor pointed out that networkFiringSolution wasn't
actually necessary, since it was checked immediately and then never
again.

The relevant code has been heavily restructured to eliminate unnecessary
calculations and memory allocation.

In the process of doing so, it became apparent that MegaMek is not
implementing the penalties of firing an overheating arc as mandated by
Total Warfare. A comment to that effect has been added.

This section of code specifically checks whether a BA squad has already
fired a taser or Narc at a different target.

It may be possible to optimize this further if it can be assumed that
all CI attacks either have the infantry flag or are field guns, but I've
settled for replicating the previous logic for now.

…olo weapons