Stop purging caches in bin/storage adjust
- This workflow doesn't work under reasonable configurations and isn't trivial to fix (see T6548).
- We don't need it; this just makes things a little bit faster if you have to migrate everything (e.g., immediately after T1191) and the installs we know about have generally upgraded by now.
- This keeps kicking PKCS8 keys out of cache which is a pain.
Test Plan: Ran bin/storage adjust without it doing an implicit cache purge.
Reviewed By: btrahan
Maniphest Tasks: T6548
Differential Revision: https://secure.phabricator.com/D11377