R1:03639a7c1e79

OAuth - add concept of "trusted" clients that get auto redirects

Summary: Fixes T7153.

Test Plan:
used `bin/auth trust-oauth-client` and `bin/auth untrust-oauth-client` to set the bit and verify error states.

registered via oauth with `bin/auth trust-oauth-client` set and I did not have the confirmation screen
registered via oauth with `bin/auth untrust-oauth-client` set and I did have the confirmation screen

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest…