move bottle_drop to examples (#8187)

cmake/configs/nuttx_aerocore2_default.cmake

cmake/configs/nuttx_auav-x21_default.cmake

cmake/configs/nuttx_crazyflie_default.cmake

cmake/configs/nuttx_mindpx-v2_default.cmake

cmake/configs/nuttx_nxphlite-v3_default.cmake

cmake/configs/nuttx_px4-same70xplained-v1_default.cmake

cmake/configs/nuttx_px4fmu-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/nuttx_px4nucleoF767ZI-v1_default.cmake

cmake/configs/posix_sitl_default.cmake

src/examples/bottle_drop/CMakeLists.txt

src/examples/bottle_drop/bottle_drop.cpp

src/examples/bottle_drop/bottle_drop_params.c