MM-28419: Move SetLogger() to Server. (#15551)

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/server.go

@@ -1538,3 +1538,7 @@ func (s *Server) TelemetryId() string {
 func (s *Server) HttpService() httpservice.HTTPService {
 	return s.HTTPService
 }
+
+func (s *Server) SetLog(l *mlog.Logger) {
+	s.Log = l
+}