v0.43.0

Features:

• added vtol state implementation (follow up) (#1521).
• Add param_set handling (#1519).
• geofence: add method to clear fence (#1517).
• Add heading to global_position telemetry plugins (#1514).

Bugfixes:

• mission: add support for DO_GIMBAL_MANAGER_CONFIGURE in mission download (#1524).
• Mission raw server callbacks nullptr check (#1520).
• Clear photo list when storage is formatted (#1516).
• Null check action callbacks (#1515).

Enhancements:

• mission: remove VehicleAction for now (#1526).
• camera: fix variable shadowing (#1518).

Contributors:

@bazfp, @JonasVautherin, @julianoes, @mattes-bru