L1calo efex tau bdt add max and min thresholds

This reflects the latest l1calo efex tau BDT modifications added in this MR to eFEXFirmware.

• Add min. ET threshold for the l1calo efex tau BDT condition shown to improve performance (e.g. see here, slide 18), integrated with the parameter added in this MR (https://its.cern.ch/jira/browse/ATR-28991)
• Implement max. ET cutoff for BDT condition