SIH in SITL with lockstep (#19028)

* sih: Move sih out of work queue
This reverts commit bb7dd0cf00.

* sih-sim: Enable sih in sitl, together with lockstep

* sih-sim: new files for sih: quadx and airplane

* sih: Added tailsitter for sih-sitl simulation

* sitl_target: Added seperate target loop for sih

* jmavsim_run: Allow jmavsim to run in UDP mode

* lockstep: Post semaphore on last lockstep component removed

* sih-sim: Added display for effectively achieved speed

* sih: increase stack size

* sih-sim: Improved sleep time computation, fixes bug of running too fast

* sitl_target: place omnicopter in alphabethic order

Co-authored-by: romain-chiap <romain.chiap@gmail.com>
Co-authored-by: Matthias Grob <maetugr@gmail.com>

Tools/sitl_run.sh

@@ -74,6 +74,9 @@ if [ "$model" == "" ] || [ "$model" == "none" ]; then
 	if [ "$program" == "jsbsim" ]; then
 		echo "empty model, setting rascal as default for jsbsim"
 		model="rascal"
+	elif [ "$program" == "sihsim" ]; then
+		echo "empty model, setting quadx as default for sihsim"
+		model="quadx"
 	else
 		echo "empty model, setting iris as default"
 		model="iris"
@@ -214,6 +217,12 @@ elif [ "$program" == "jsbsim" ] && [ -z "$no_sim" ]; then
 	fi
 	"${build_path}/build_jsbsim_bridge/jsbsim_bridge" ${model} -s "${src_path}/Tools/jsbsim_bridge/scene/${world}.xml" 2> /dev/null &
 	JSBSIM_PID=$!
+elif [ "$program" == "sihsim" ] && [ ! -n "$no_sim" ]; then
+	export SIM_MODE="sihsim"
+	if [ "$model" != "airplane" ] && [ "$model" != "quadx" ] && [ "$model" != "xvert" ]; then
+		echo "Model ${model} not compatible with with sih. sih supports [quadx,airplane,xvert]."
+		exit 1
+	fi
 fi
 
 pushd "$rootfs" >/dev/null