Add techpod SITL Gazebo target (#15919)

* Add techpod SITL target

This adds a SITL target forthe techpod fixedwing model

* Update sitl_gazebo submoudle

This submodule update includes the techpod UAV model

ROMFS/px4fmu_common/init.d-posix/airframes/1035_techpod

@@ -0,0 +1,47 @@
+#!/bin/sh
+#
+# @name Plane SITL
+#
+
+sh /etc/init.d/rc.fw_defaults
+
+if [ $AUTOCNF = yes ]
+then
+	param set EKF2_ARSP_THR 8
+	param set EKF2_FUSE_BETA 1
+	param set EKF2_MAG_ACCLIM 0
+	param set EKF2_MAG_YAWLIM 0
+
+	param set FW_LND_AIRSPD_SC 1
+	param set FW_LND_ANG 8
+	param set FW_THR_LND_MAX 0
+
+	param set FW_L1_PERIOD 15
+
+	param set FW_P_TC 0.5
+	param set FW_PR_FF 0.40
+	param set FW_PR_I 0.05
+	param set FW_PR_P 0.05
+
+	param set FW_R_TC 0.7
+	param set FW_RR_FF 0.20
+	param set FW_RR_I 0.02
+	param set FW_RR_P 0.22
+
+	param set FW_L1_PERIOD 12
+
+	param set FW_W_EN 1
+
+	param set MIS_LTRMIN_ALT 30
+	param set MIS_TAKEOFF_ALT 30
+
+	param set NAV_ACC_RAD 15
+	param set NAV_DLL_ACT 2
+	param set NAV_LOITER_RAD 50
+
+	param set RWTO_TKOFF 1
+
+fi
+
+set MIXER_FILE etc/mixers-sitl/plane_sitl.main.mix
+set MIXER custom

ROMFS/px4fmu_common/init.d-posix/airframes/CMakeLists.txt

@@ -57,6 +57,7 @@ px4_add_romfs_files(
 	1033_plane_lidar
 	1033_rascal
 	1034_rascal-electric
+	1035_techpod
 	1040_standard_vtol
 	1041_tailsitter
 	1042_tiltrotor

Tools/sitl_gazebo

@@ -1 +1 @@
-Subproject commit e4e32117df1d8aba00b0685ebd0cc5ffc066a970
+Subproject commit c3b15b7c9bf217c52f1e12fda0f861f6af5f31a9

platforms/posix/cmake/sitl_target.cmake

@@ -93,7 +93,7 @@ set(viewers none jmavsim gazebo)
 set(debuggers none ide gdb lldb ddd valgrind callgrind)
 set(models none shell
 	if750a iris iris_dual_gps iris_opt_flow iris_opt_flow_mockup iris_vision iris_rplidar iris_irlock iris_obs_avoid iris_rtps px4vision solo typhoon_h480
-	plane plane_cam plane_catapult plane_lidar
+	plane plane_cam plane_catapult plane_lidar techpod
 	standard_vtol tailsitter tiltrotor
 	rover r1_rover boat cloudship
 	uuv_hippocampus)