[227k_12] Fix death messages for CAR and UMS Rocket Launcher

[NeonKnightOA]

Steps for reproduction:

• Start a botmatch in any map that has these weapons (DmStomp, for example)
• Make sure bots are added to the match
• Make sure Classic Death Messages are disabled(so the newly added)
• Frag the bots with the aforementioned weapons

Desired outcome:

• If fragging with the UMS Rocket Launcher, there should be a "%k's rocket turned %o's body into chunks." message.
• If fragging with the CAR, there should be a "%k's Combat Assault Rifle turned %o into swiss cheese." message.

Actual outcome:

• If fragging with the UMS Rocket Launcher, a generic message appears.
• If fragging with the CAR, a generic message appears.

Additional notes:

• Strangely enough, the Grenade Launcher's death message acts as intended.