commander: avoid duplicated publish, cleanup log output for offboard_mission update
commander: avoid duplicated publish, cleanup log output for offboard_mission update

- orb_advertise already publishes a struct, no need for orb_publish
- mavlink_log_critical goes to the console too

jlecoeur/Firmware,mcgill-robotics/Firmware,PX4/Firmware,Aerotenna/Firmware,Aerotenna/Firmware,dagar/Firmware,krbeverx/Firmware,acfloria/Firmware,krbeverx/Firmware,krbeverx/Firmware,dagar/Firmware,acfloria/Firmware,acfloria/Firmware,krbeverx/Firmware,dagar/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,krbeverx/Firmware,Aerotenna/Firmware,jlecoeur/Firmware,PX4/Firmware,jlecoeur/Firmware,mcgill-robotics/Firmware,mje-nz/PX4-Firmware,krbeverx/Firmware,dagar/Firmware,Aerotenna/Firmware,mcgill-robotics/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,Aerotenna/Firmware,PX4/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,PX4/Firmware,dagar/Firmware,acfloria/Firmware,jlecoeur/Firmware,PX4/Firmware,dagar/Firmware,mcgill-robotics/Firmware,krbeverx/Firmware,acfloria/Firmware,acfloria/Firmware,mcgill-robotics/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,mcgill-robotics/Firmware,mcgill-robotics/Firmware,PX4/Firmware,Aerotenna/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware