Since we're sharing functions between test scripts, move greenprint(),
the most rewritten function in the history of the project, to
shared_lib.sh and source it everywhere.
- Handle the array responses from the new weldr-client (>= 35.6).
- Move the `get_build_info` function to shared_libs.sh to source and
reuse in multiple places.
This test used to spawn two VMs at the same time which requires more
memory than the Openstack ci medium runner can provide. We want to be
using only medium runners so this change is necesasry to allow that.
