The Short list of economic operators should be defined at the tendering terms level

Add EconomicOperatorShortList class in TenderingTerms as an optional ASBIE.

This class is already in the Tendering Process class but the Publications Office requires it in the Tendering Terms as well.

From the PO:
It seems that the envisaged number of candidates is needed in the Tendering Process in F12 so please keep it in the Tendering Process:
However we also need an element in Tendering terms, we suggest copying (not moving) the same class in Tendering terms, if not please create a new class something like <CandidateList> in tendering terms. Ie:
As you can see in both cases we only need 0..1 if you have put 0..n that is also fine with us.

I would recommend creating an ASBIE to the same class EconomicOperatorShortList instead of creating a new CandidateList class exactly equal to EconomicOperatorShortList