Introduce separate events for starting various TARS variants

src/RIGv2/Radio/Radio.cpp

...Gv2/StateMachines/GroundModeManager/GroundModeManager.cpp

src/RIGv2/StateMachines/TARS1/TARS1.cpp

src/RIGv2/StateMachines/TARS3/TARS3.cpp

src/common/Events.h