Strip unused run and monitor types when creating workflows

[SimonHeybrock]

See, e.g.,

essdiffraction/src/ess/dream/io/geant4.py

Line 274 in b4eb3c2

wf = GenericNeXusWorkflow()

. Use the (new) parameters to https://scipp.github.io/essreduce/generated/modules/ess.reduce.nexus.workflow.GenericNeXusWorkflow.html#ess.reduce.nexus.workflow.GenericNeXusWorkflow to keep only what is needed.