R1:9e88ede69d90

Use standard subscribers effects in Herald Adapter for revisions

Summary:
Ref T8455. Use standard effects for revisions, instead of a custom effect.

This fixes the major issue (conduit error) in T8455 because the standard effect now performs PHID type filtering.

This retains other behaviors (in particular: not re-CC'ing explicitly removed CCs).

Test Plan:
- With a Herald rule that adds a mailing list as a CC, created a revision before the change and hit the error in T8455. After the change, saw…