Fix detection of jobs explicitly marked Work-In-Progress
The app skips creating/updating Phabricator tasks for jobs on WIP branches, as we only care about failures on the main branches.
To do so, it was looking for a wip
entry in the source
metadata, but
LAVA does not like nested objects in the job metadata, so the actual
entry is source.wip
, see the job template:
https://gitlab.apertis.org/tests/apertis-test-cases/-/blob/c351f87d/lava/common-boot-tpl.yaml#L41