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 correct behavior.
• Wrote a normal Herald rule to add CCs and created a revision, saw it fire properly.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8455

Differential Revision: https://secure.phabricator.com/D13183