Make tracker publisher keep-history parameter mandatory
Current situation
By default, the tracker publisher plugin updates the most recent results for a given quality gate if the gitlab/keep-history
label is not set in the workflow.
Desired outcome
keep-history
parameter must now be defined, in the first place, at the instance level in the instances file, where it is mandatory.
It can be overwritten by the gitlab/keep-history
label (optional) at the workflow level.