Fix name collisions in XMLSummaryKernel tests

See merge request !3930 (merged)

(cherry picked from commit 4c1fc7a7)

added all-slots bug fix legacy testing labels

changed the description

• [2023-04-26 00:05] Validation started with lhcb-2017-patches#1356

removed all-slots label

merged

mentioned in commit da9015ce