Comment 4 for bug 1958995

Reviewed: https://review.opendev.org/c/openstack/tripleo-quickstart-extras/+/826284
Committed: https://opendev.org/openstack/tripleo-quickstart-extras/commit/f07c71809d8820802478ebe8854c78e4c147d051
Submitter: "Zuul (22348)"
Branch: master

commit f07c71809d8820802478ebe8854c78e4c147d051
Author: yatinkarel <email address hidden>
Date: Tue Jan 25 18:40:11 2022 +0530

    Allow dlrn builds from both deploy release and upgrade release

    DLRN with --local and --dev options uses whatever already checked
    out source and distgit[1]. So in order to get packages build for
    multiple releases like in upgrade jobs we need to prepare both
    source(git clean and git checkout) and distgit(remove it so
    DLRN fetches it based on config).

    Also use release var to compute what change to build when it's
    defined, when not defined use zuul override-checkout or branch.
    Additionally add non-cached fact artg_change_list_prep to compute
    the changes list as using artg_change_list causes inclusion of
    changes from previous run.

    [1] https://github.com/softwarefactory-project/DLRN/issues/39

    Co-authored-by: Bogdan Dobrelya <email address hidden>

    Closes-Bug: #1958995
    Change-Id: I1495128dc3087bc728a51cf667a8fb394fe87893