Write new hunks to the modern hunk store
Summary: Ref T4045. Ref T5179. Send all new writes into the modern store.
Test Plan:
- Created a diff.
- Verified it went to the modern store.
- Destroyed a revision, verified hunks were destroyed.
- Also unit tests.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Differential Revision: https://secure.phabricator.com/D9293