[Notification] Send notification options (#49576)

src/metabase/api/pulse.clj

src/metabase/events/notification.clj

src/metabase/notification/core.clj

src/metabase/pulse/send.clj

src/metabase/task/notification.clj

src/metabase/task/send_pulses.clj

test/metabase/events/notification_test.clj

test/metabase/notification/test_util.clj