Add alternative tagger hypo to fast GN1

Cherry pick @tmadula's MR to add hypo for fastGN1 with PV. See the original MR in !63500 (closed). This MR switches the preselection fastGN1 b-tagger to use the same model as the TLA GN1, which can make use of the PV information. Since all the fastGN1 chains are still in the dev menu, the change of model would not affect the physics menu.

Targeting the main branch according to the latest trigger development guideline.