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
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}