do not attempt build of packages if dependency failed

[v4hn]

only relevant for CONTINUE_ON_ERROR: true.

Drastically shortens build times and lists of error logs on partial errors.

[jspricke]

We can maybe use colcon --packages-skip-by-dep here. colcon will be in newer Debian/Ubuntu version or use the version from OSRF. See jspricke/ros-deb-builder-action@8eacb60