infinitepush: replace `remotenames.hoist` with `remotenames.hoistedpeer`

The remotenames.hoist config option was renamed to remotenames.hoistedpeer while
moving to core as an extension. Let's start using the config option provided by
the in-core extension.

Differential Revision: https://phab.mercurial-scm.org/D2990

hgext/infinitepush/__init__.py

@@ -233,7 +233,7 b' def _tryhoist(ui, remotebookmark):'
     '''
 
     if common.isremotebooksenabled(ui):
-        hoist = ui.config('remotenames', 'hoist') + '/'
+        hoist = ui.config('remotenames', 'hoistedpeer') + '/'
         if remotebookmark.startswith(hoist):
             return remotebookmark[len(hoist):]
     return remotebookmark