Hitting enemies/destructible terrain with projectiles no longer puts player in hitpause

[floral-qua-floral]

Pretty small and straightforward change. I also made it so that enemies will respect the HG_EXTRA_HITPAUSE grid index. This just adds the value to the amount of hitpause that the enemy takes; it's then subtracted again when calculating how long the attacking player should enter hitpause. This is a dumb way to do it but it's easy, functional, and doesn't have a meaningful performance cost so 🤷‍♀️

Destructible terrain doesn't check for extra hitpause at all, because it never enters hitpause, from what I could tell.