Ignore PHAR extensions in Version Check and a Celerity test
Summary:
in /config/ page, don't try to figure out versions for PHAR-packaged extensions for now.
We'll work something out eventually.
Depends on D26379. Refs T16300
Test Plan: load PHAR extension, look at config page, no errors in log.
Reviewers: O1 Blessed Committers, mainframe98
Reviewed By: O1 Blessed Committers, mainframe98
Subscribers: mainframe98, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Maniphest Tasks: T16300
Differential Revision: https://we.phorge.it/D26507