Summary:
Ref T603. Ref T2625.
Long chain of "doing the right thing" here: I want to clean this up, so I can clean up the Conduit logs, so I can add a setup issue for deprecated method calls, so I can remove deprecated methods, so I can get rid of `DifferentialRevisionListData`, so I can make Differntial policy-aware.
Adds modern infrastructure and UI to all of the Conduit interfaces (except only partially for the logs, that will be the next diff).
Test Plan:
{F48201}
{F48202}
{F48203}
{F48204}
{F48206}
This will get further updates in the next diff:
{F48205}
Reviewers: btrahan, chad
Reviewed By: chad
CC: aran
Maniphest Tasks: T603, T2625
Differential Revision: https://secure.phabricator.com/D6331
