MM-51321 Refactor audit log application. (#22481)

* Refactor audit log application.

* Fix incorrect API Usage for Auditing

* Fixups.

* Rename Object audit to Auditable. Some small fixes.

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Co-authored-by: Daniel Schalla <daniel@schalla.me>

model/session.go

@@ -70,7 +70,6 @@ func (s *Session) Auditable() map[string]interface{} {
 		"is_oauth":         s.IsOAuth,
 		"expired_notify":   s.ExpiredNotify,
 		"local":            s.Local,
-		// TODO: props and members?
 	}
 }