Add shield-bypassing flag to PAR3

[Iritscen]

Loser has requested that we add a flag for PAR3 (there are several unused bits between flags1 and flags2) which would allow a particle to bypass red and blue character shields (the boss shield and force shield) when dealing damage.

Shield-bypassing would allow him to create a more proper wall interaction mod for combat (e.g. smashes, stuns). It would also allow for thrown characters to fly over obstacles (over a railing, out of a window, etc.).
Right now those concepts are broken when a character has one of these shields active.