GM Frag Compat and Convertable Frags

[lambdatiger]

This PR:

• Adds GM ace frag compats
• Makes GM grenades convertible
• Adds a Gold Uzi.

Need someone to spot check I didn't ruin inheritance anywhere.

[PabstMirror]

Should the frag stuff just go into ace?

[lambdatiger]

Should the frag stuff just go into ace?

Yes, it should at some point, but for frag switching we need part of it (skip flag for concussion and practice grenades), and I had the rest on hand and just copied the rest in. I definitely can split part of this into an ACE PR instead. There are a few things that I need to do some more fine tuning in for parameters before I make the PR for ACE. Specifically, I'd have to either remove all the fragCount references until a later date or dial it in more and hope it works well with the final PR. Made changes to make it easier to review, will put the rest back in the box for now.