Remove usage of deprecated HltLine

The HltLine constructor was deprecated in !716 (merged). Line authors should use DecisionLine or Hlt2Line directly.

Rather than updating everything in one go in !716 (merged) and introducing conflicts with PAWG branches, authors are encouraged to update instances as they go. We may do a batch update for the remaining instances in the future.

changed the description

mentioned in commit 12169b7f

mentioned in commit eb019721

mentioned in commit 7f0105ba

added Configuration cleanup hlt2 labels

mentioned in commit 7b0ce27d

mentioned in merge request !1791 (merged)

mentioned in merge request !2175 (merged)

mentioned in merge request !2761 (merged)

Cleanup is ongoing at !2761 (merged)

closed with merge request !2761 (merged)

mentioned in commit 99b85f34