Add \ALLOW_NONWORKER_TARGETS to all \ALLOW_MULTIPLE_TARGETS syndromes

Required for DFHack4 integration on reactionst that target non-workers.

I'm not convinced this will make all the reactions actually work.
A lot of them seem to contain invalid \COMMANDs (or at least are
calling commands where I have no idea where they'd come from.)
Merge branch 'dfhack_r4' into drowfort

* dfhack_r4:
  Add \ALLOW_NONWORKER_TARGETS to all \ALLOW_MULTIPLE_TARGETS syndromes