version: remove FW_GIT & FW_BUILD_URI, use the correct methods instead

src/lib/version/version.h

src/modules/uavcan/uavcan_main.cpp

src/modules/uavcanesc/uavcanesc_main.cpp

src/modules/uavcannode/uavcannode_main.cpp

src/systemcmds/hardfault_log/hardfault_log.c

src/systemcmds/ver/ver.c