remaining work queue cleanup

[dagar]

Everything within PX4 should be migrated to the new in tree work queue (https://github.com/PX4/Firmware/blob/master/src/platforms/common/px4_work_queue). Then NuttX builds will drop HPWORK and LPWORK (unless brought in by a NuttX level dependency).

• boards
  • HPWORK
    • intel aero adc (aerfc_adc: move to PX4 WQ and cleanup #13897)
    • navio_sysfs_rc_in (navio_sysfs_rc_in: move to PX4 WQ and cleanup #13898)
• drivers
  • HPWORK
    • batt_smbus (batt_smbus move to new WQ #12170)
    • camera_capture
    • AK09916 (AK09916 move to new WQ, PX4Magnetometer, and cleanup #12088)
    • INA226 (INA226 move to new WQ and cleanup #12089)
    • px4flow (px4flow driver move to new WQ and cleanup #12234)
    • px4fmu (uORB Subscription callbacks with WorkItem scheduling on publication #12207)
    • rc_input (rc_input: move to PX4 WQ and minor cleanup #13619)
  • LPWORK
    • camera_trigger (camera_trigger move to new WQ and uORB::Subscription #12177)
    • heater (heater move to new WQ and uORB::Subscription #12174)
    • OSDatxxxx (osd/atxxxx move to new WQ and uORB::Subscription #12173)
• libs
  • LPWORK
    • parameters (parameters move param save to PX4 work queue and fully remove NuttX LPWORK #15828)
• modules
  • HPWORK
    • land_detector (land_detector move orb subscriptions to uORB::Subscription #12121)
    • simulator (airspeed) (simulator move to PX4Accelerometer, PX4Gyroscope, PX4Magnetometer, PX4Barometer helpers #12081)
  • LPWORK
    • send_event (send_event: move to new WQ and uORB::Subscription #12176)
    • load_mon (load_mon move from NuttX LPWORK to PX4 work queue lp_default #12090)
    • wind_estimator (wind_estimator move to new WQ (lp_default) and uORB::Subscription #12172)
• platforms
  • HPWORK
    • shutdown

[dagar]

TODO: create generic dispatch queue that will take anything Callable. This will be used to replace the last few free form work_queue users like parameter save and shutdown hooks.

Something close to https://github.com/embeddedartistry/embedded-resources/blob/master/examples/cpp/dispatch.cpp, but without using the c++ standard library.