NuttX generate Make.defs per config from PX4 cmake (#8573)

platforms/nuttx/NuttX/CMakeLists.txt

platforms/nuttx/nuttx-configs/Make.defs.in

platforms/nuttx/nuttx-configs/PX4_Config.mk

platforms/nuttx/nuttx-configs/PX4_Warnings.mk

platforms/nuttx/nuttx-configs/aerocore2/nsh/Make.defs

platforms/nuttx/nuttx-configs/aerocore2/src/Makefile

platforms/nuttx/nuttx-configs/aerocore2/src/empty.c

platforms/nuttx/nuttx-configs/aerofc-v1/nsh/Make.defs

platforms/nuttx/nuttx-configs/aerofc-v1/src/Makefile

platforms/nuttx/nuttx-configs/aerofc-v1/src/empty.c

platforms/nuttx/nuttx-configs/auav-x21/nsh/Make.defs

platforms/nuttx/nuttx-configs/auav-x21/src/Makefile

platforms/nuttx/nuttx-configs/auav-x21/src/empty.c

platforms/nuttx/nuttx-configs/crazyflie/nsh/Make.defs

platforms/nuttx/nuttx-configs/crazyflie/src/Makefile

platforms/nuttx/nuttx-configs/crazyflie/src/empty.c

platforms/nuttx/nuttx-configs/esc35-v1/nsh/Make.defs

platforms/nuttx/nuttx-configs/esc35-v1/src/Makefile

platforms/nuttx/nuttx-configs/esc35-v1/src/empty.c

platforms/nuttx/nuttx-configs/mindpx-v2/nsh/Make.defs