Removed global.vehicleDismountHoldTime convar
Added more specific convars in it's place: groundVehicleDismountTime, flyingVehicleDismountTime, aquaticVehicleDismountTime and horseDismountTime
Each convar controls how long it takes to dismount things to support scenarios like immediately dismounting cars but having a 0.5s delay when dismounting air or ocean vehicles
Not every vehicle fit perfectly into a category, some notable decisions:
-Workcarts, trains, sleds and snowmobiles are considered ground vehicles
-Parachutes and ziplines are considered flying vehicles
-Submarines, boogie boards and inner tubes are considered aqautic
-A computer station is considered a flying vehicle if a drone is currently being controlled