Add new Xbb chains and modify the existing ones to have phase1 L1 seed along with preselection
This MR adds new X to bb test trigger chains with lower thresholds. In addition, it modifies the existing X to bb test chains so that they have a preselection applied and the L1 seed is modified with phase1 L1 seeds. The minimal trigger ART tests were performed using runTrigART.py -m -j 4
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CC: @lshi , @lbeemste
Edited by Roshan Joshi