Convert Pumble integration to use DSL

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/127397



Merged-by: Douglas Barbosa Alexandre <dbalexandre@gmail.com>
Approved-by: Douglas Barbosa Alexandre <dbalexandre@gmail.com>
Approved-by: Michael Becker <11881043-wandering_person@users.noreply.gitlab.com>
Reviewed-by: Bojan Marjanovic <bmarjanovic@gitlab.com>
Reviewed-by: Michael Becker <11881043-wandering_person@users.noreply.gitlab.com>
Co-authored-by: bmarjanovic <bmarjanovic@gitlab.com>