Update match screen UI for Holdings

Purpose: To add options for matching to an Inventory Holdings based on Purchase order line numbers (POLs) or Vendor reference numbers (VRNs) associated with it.

Full description of the feature: https://wiki.folio.org/pages/viewpage.action?pageId=73535666

As a staff person working with MARC files and Data Import
I want to be able to use a POL or VRN to match to an associated Inventory Holdings
So that I can update the Holdings based on data supplied in the MARC record

Scenarios

1. Scenario 1
   • Given: the Settings/Data Import/Match Profiles Create/Edit screen
   • When: a User selects Holdings as the Existing record type
   • Then: add the following options at the end of the dropdown list of available fields
     • Acquisitions data: Purchase order line (POL)
     • Acquisitions data: Vendor reference number
   • See attached mockup: POL-VRN Match-Holdings match changes.PNG
2. Scenario 2
   • Given: the Settings/Data Import/Match Profiles View screen
   • When: the match has Holdings as the Existing record type
   • And the user has selected one of the above new options on the Create/Edit screen
   • Then: display that option in the Existing Holdings record field of the View screen (not editable)
3. Scenario 3
   • Ensure automated unit test coverage for this new code is 80% plus

NOTE: Per Slava's comment below: Existing Holdings record field for VRN should be 'holdingsrecord.vendorReferenceNumber' for back-end to be able to read it according to work done in MODINV-577

See attached screenshot