Add muon chains to "bphysicsexo" tests (ATR-20604)
modified: Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_slice_bphysicsexo_build.py modified: Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_slice_bphysicsexo_grid.py
modified: Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_slice_bphysicsexo_build.py modified: Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_slice_bphysicsexo_grid.py