path: return path instance directly from get_pull_paths
This means the caller has to do a bit more work, however it give access to the
`path` instance and the information it contains.
Differential Revision: https://phab.mercurial-scm.org/D11673
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"phabricator.uri": "https://phab.mercurial-scm.org/",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}