FIX: notification reminder is deleted with bookmark (#35069)

Prior to this fix a user could delete a chat bookmark but the
notification reminder if it had already fired would still show in
notifications.

plugins/chat/spec/system/bookmark_message_spec.rb

@@ -103,6 +103,37 @@ RSpec.describe "Bookmark message", type: :system do
         )
       end
     end
+
+    context "with reminder notification cleanup" do
+      it "removes bookmark reminder notification when bookmark is deleted" do
+        chat_page.visit_channel(category_channel_1)
+        channel_page.bookmark_message(message_1)
+        bookmark_modal.fill_name("Check this out later")
+        bookmark_modal.select_preset_reminder(:tomorrow)
+
+        expect(channel_page).to have_bookmarked_message(message_1)
+
+        bookmark = Bookmark.find_by(bookmarkable: message_1, user: current_user)
+        Chat::MessageBookmarkable.send_reminder_notification(
+          bookmark,
+          data: {
+            title: bookmark.bookmarkable.chat_channel.title(current_user),
+            bookmarkable_url: bookmark.bookmarkable.url,
+          },
+        )
+
+        user_menu.open
+
+        expect(page).to have_css("#quick-access-all-notifications .bookmark-reminder")
+
+        channel_page.bookmark_message(message_1)
+        bookmark_modal.delete
+        bookmark_modal.confirm_delete
+        user_menu.open
+
+        expect(page).to have_no_css("#quick-access-all-notifications .bookmark-reminder")
+      end
+    end
   end
 
   context "when mobile", mobile: true do