[ATR-26553] Small change of Trigger Decision Validator behavior

Update validator check to count HLT passes of the event, rather than explicit physics passes.

This prevents the validator from flagging up events which may have e.g. passed only HLT_noalg_L1All as not having passed any HLT chain.

Any L1All chain is not considered a physics-pass as it has no explicit L1 with definite prescale.