feat: infer SSH toolchain from device flag
This allows using the SSH toolchain as an override, but without needing to set --extra_toolchains
explicitly:
bazel test :test \
--platforms=@toolchain_utils//toolchain/platform:arm64-linux \
--@rules_labgrid//labgrid/setting/network:address=$BOARD_IP
Closes #88.
Edited by Alex Tercete