Handle a list of multi-field delimited lists of category names in a single legacy_field when mapping organizations

[bltravis]

The current implementation of category mapping does not allow you to supply categories to sub-delimited addresses, phone number, and email addresses when mapping organizations. For example (<^> is the multi-field delimiter):

address_line1	address_line2	address_city	address_state_province	address_postal_code	address_categories
123 N Main St.<^>Fulfillment Center	<^>Pier 13	Springfield<^>San Francisco	MO<^>CA	65807<^>94133	[Payments, Billing, Orders, Custom Support]<^>[Shipping, Sales]
Accounts Payable<^>Returns Center	PO Box 12345<^>543 Copa Cabana Ave	Springfield<^>Miami	MO<^>FL	65803<^>33101	[Payments, Billing, Orders, Shipping]<^>[Custom Support, Sales, Returns]

The tools should recognize the []-wrapped lists as lists and iterate through them to map the category names to FOLIO reference data. This would better support mapping from Alma vendor data.