* disable SENS_EN_GPSSIM for all gz airframes
* add GPS + noise to GZBridge
* remove mutex from gz callbacks. Callbacks run synchronously after sim update step and run() loop does not share resources.
* remove hrt check in callbacks
* format
* remove param set-default for already default params
* update submodule
* remove unnecessary comments
* overhaul of the GZBridge and px4-rc.simulator script
* remove arg
* shellcheck disable
* add bus/address
* start gz_bridge before adjusting sim speed or camera follow