unit_test inline implementation and remove module build

cmake/configs/nuttx_aerocore2_default.cmake

cmake/configs/nuttx_auav-x21_default.cmake

cmake/configs/nuttx_mindpx-v2_default.cmake

cmake/configs/nuttx_px4fmu-v2_test.cmake

cmake/configs/nuttx_px4fmu-v3_default.cmake

cmake/configs/nuttx_px4fmu-v4_default.cmake

cmake/configs/nuttx_px4fmu-v4pro_default.cmake

cmake/configs/nuttx_px4fmu-v5_default.cmake

cmake/configs/posix_sitl_default.cmake

src/drivers/sf0x/sf0x_tests/SF0XTest.cpp

src/include/unit_test.h

src/lib/rc/rc_tests/RCTest.cpp

...s/commander/commander_tests/state_machine_helper_test.cpp

src/modules/mavlink/mavlink_tests/mavlink_ftp_test.h

...pos_control/mc_pos_control_tests/mc_pos_control_tests.cpp

src/modules/unit_test/CMakeLists.txt

src/modules/unit_test/unit_test.cpp

src/systemcmds/tests/test_autodeclination.cpp

src/systemcmds/tests/test_conv.cpp

src/systemcmds/tests/test_float.cpp