moving from L1TAU12 to L1TAU8 ptonly chain + removing BDT+trackMVA chains

Changes:

• HLT_tau0_perf_ptonly_L1TAU12 -> HLT_tau0_ptonly_L1TAU8
• HLT_tau0_perf_ptonly_L1TAU60 -> HLT_tau0_ptonly_L1TAU60
• HLT_tau200_mediumRNN_ptonly_L1TAU100 -> HLT_tau200_ptonly_L1TAU100

Removed triggers from LS2_v1 since BDT TauID is defined only for track/tracktwo/tracktwoEF chains:

• HLT_tau25_medium1_tracktwoMVA_L1TAU12IM
• HLT_tau25_medium1_tracktwoMVABDT_L1TAU12IM
• HLT_tau160_medium1_tracktwoMVA_L1TAU100
• HLT_tau160_medium1_tracktwoMVABDT_L1TAU100
• HLT_tau200_medium1_tracktwoMVA_L1TAU100
• HLT_tau200_medium1_tracktwoMVABDT_L1TAU100