SITL: Add simulator for tethered vehicle · ArduPilot/ardupilot@6ea1082

comparison of integer expressions of different signedness: 'esp_cpu_cycle_count_t' {aka 'long unsigned int'} and 'int32_t' {aka 'long int'} [-Wsign-compare]

#warning "This header file has been moved, thus `#include <freertos/xtensa_api.h>` is deprecated. Please use `#include <xtensa_api.h>` instead" [-Wcpp]

#warning driver/periph_ctrl.h header is no longer used, and will be removed in future versions. [-Wcpp]