Rebrand: Add "path" entries to PlatformSymbols
Summary: Ref T15006. Change a few places that were mentioning phabricator path.
Test Plan: Mk1 eyeball on each effected page.
Reviewers: O1 Blessed Committers, valerio.bozzolan
Reviewed By: O1 Blessed Committers, valerio.bozzolan
Subscribers: speck, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Maniphest Tasks: T15006
Differential Revision: https://we.phorge.it/D25343