Add support for assigning lists to StringArrayOption

[fflaten]

PR Summary

Follow-up to #2101 which enabled use of lists when assigning ex. Run.Path from hashtable. This PR enables assigning lists to an existing configuration-object, ex $c.Run.Path = [arraylist]@().

Fix #2100

PR Checklist

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• [x] Tests are added/update (if required)
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