Remove uses of Autohook from clientchathooks.cpp

[ASpoonPlaysGames]

Code review:

• The original function is prefixed with o_p so any times where the old AUTOHOOK was calling the original function it should now be calling that instead.
• The hook function is prefixed with h_ so any times where we would be wanting to call the hooked function from other functions should now be calling that instead

Testing:

• Check logs to make sure that all of the changed hooks are being created properly
• Make sure that CHudChat_ProcessMessageStartThread still gets called in the CLIENT squirrel VM (probably easiest to add a debug print there)

[F1F7Y]

Look good 👍

[GeckoEidechse]

Imma say we just test it in prod :)