Replace createVehicleCrew with fn_createCrew

[PiG13BR]

Q	A
Bug fix?	no
New feature?	no
Needs wipe?	no

Description:

• Ditch createVehicleCrew command and replace it with a function that uses preset configuration only. Now you can put a different faction assets in the same preset without spawning crew that not fit into your scenario.
• The function checks what kind of vehicle is to get the correct type of crew.
• The function tries to find empty seats for driver, gunner and commander. For the turret seat (generally from helicopters), only gets the co-pilot.

Content:

• [ x] Add new function called fn_createCrew
• [ x] Replace all createVehicleCrew command in the files
• Put the new variables (used in the function) in other presets

Successfully tested on:

• [ x] Local MP
• [ x] Dedicated MP

[some-evil-kitty]

Most presets don't have pilots and crew defined yet - maybe add some logic inside the function to default to something if they're not defined? I was thinking rifleman for crew at the very least.

[PiG13BR]

Yes, I can do that for now, but I could also add those variables on the other presets aswell, it's boring but I can do it with time. Tell me if this is worth it so I can manage my time to add them.

[PiG13BR]

Done. I've put the placeholder types of crew that already exist on presets for each side.