The setup of our test environment is split up across "ci/lib.sh" and
"ci/run-build-and-tests.sh". It is not exactly obvious why that split
even exists, and because of the split you have to know about both of the
locations to be able to figure out the specific environment that applies
to a specific job.
Consolidate the setup into "ci/lib.sh". Note that this is a pure move
for now that results in some awkward duplication. This duplication will
be cleaned up in subsequent commits.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>