ATR-28678 - L1 Jet items legacy removal

This MR is removing the some L1 Jet items legacy and replacing by the new Phase 1 trigger. https://its.cern.ch/jira/browse/ATR-28678

• Follow-up from !68248 (merged). Moving the multi-b-jet TLA dev chain (https://its.cern.ch/jira/browse/ATR-23002) to Phase1 Items. cc @cantel