Support: Display "Invalid reference" when Holdings ID is not valid

Purpose: When a user is updating a piece connected to a holding for which the piece is related to the only item/piece record linked to that holding. The Holding may no longer be meaningful but users may forget to delete it, leaving a confusing record in inventory.

User story statement(s):

As a receiving librarian
I want to be given the option to delete the related holding when unlinking the last Piece related to that holding
so that I don't need to find the holding in inventory after I am finished editing the piece record

Scenarios:

1. Scenario:
   • Given user is viewing a POL
   • When POL location information is retrieved and Holdings ID is not valid
   • Display "Invalid reference" in the Location accordion
2. Scenario:
   • Given user editing pieces
   • When POL location information is retrieved and Holdings ID is not valid
   • Display "Invalid reference" in place of Holdings name
3. Scenario:
   • Given user is receiving pieces
   • When location information is retrieved and Holdings ID is not valid
   • Display "Invalid reference" in the Location accordion