directly piggyback BBM on pickup@penn, as indicated from Alma, filtered for ETAS

[magibney]

There are some cases for which pickup@penn may not appear, in which BBM nonetheless is introduced. This derives from the same logic determining Pickup@Penn at the bibliographic level.
see record, e.g., 9963526843503681

Open question: how does this apply to records where Pickup@Penn does not apply at the bibliographic level, but for individual items?

[mksndz]

we don't show a BBM request option for Item-level things (should we?).

whether or not to show PickUp@Penn for items is determined here. https://github.com/upenn-libraries/discovery-app/blob/align_bbm_with_pickup_at_penn/app/controllers/franklin_alma_controller.rb#L441-L443

[mksndz]

makes sense that we don't want to offer BBM for an item if P@P is blocked