UAVCAN bootloaders split into separate repository (#7878)

.gitmodules

Makefile

ROMFS/CMakeLists.txt

cmake/common/px4_metadata.cmake

cmake/configs/nuttx_esc35-v1_bootloader.cmake

cmake/configs/nuttx_esc35-v1_default.cmake

cmake/configs/nuttx_px4cannode-v1_bootloader.cmake

cmake/configs/nuttx_px4cannode-v1_default.cmake

cmake/configs/nuttx_px4esc-v1_bootloader.cmake

cmake/configs/nuttx_px4esc-v1_default.cmake

cmake/configs/nuttx_px4flow-v2_bootloader.cmake

cmake/configs/nuttx_s2740vc-v1_bootloader.cmake

cmake/configs/nuttx_zubaxgnss-v1_bootloader.cmake

cmake/configs/uavcan_board_ident

cmake/configs/uavcan_board_ident/esc35-v1.cmake

cmake/configs/uavcan_board_ident/px4cannode-v1.cmake

cmake/configs/uavcan_board_ident/px4esc-v1.cmake

cmake/configs/uavcan_board_ident/px4flow-v2.cmake

cmake/configs/uavcan_board_ident/s2740vc-v1.cmake

cmake/configs/uavcan_board_ident/zubaxgnss-v1.cmake