Remove uses of Autohook from host.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 (this one logs Host_Init() in the console when it runs so check for that when going into the lobby)
• Make sure that autoexec_ns_server and autoexec_ns_client are being executed still etc.

[F1F7Y]

Changes look good 🦒

[F1F7Y]

Works in testing.