Remove more known warnings from hlt2_lead_lead tests

!2117 (merged) introduced tests that emit warnings which are not removed from the references yet. This MR fixes this.

added RTA label

assigned to @gunther

Why to hide warnings rather than removing them altogether ?

assigned to @mzdybal and unassigned @gunther

/ci-test

added ci-test-triggered label

• [2023-10-18 16:06] Validation started with lhcb-master-mr#9487

mentioned in merge request Rec!3565 (merged)

assigned to @rmatev and unassigned @mzdybal

mentioned in merge request Detector!431 (merged)

resolved all threads

approved this merge request

added testing label

merged

mentioned in commit 74f2f79b

mentioned in issue #665 (closed)