MM-33708 - Add MentionCountRoot column to ChannelMembers (#17099)

* added new column for root-only mentions

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

api4/user_test.go

@@ -5840,11 +5840,6 @@ func TestMaintainUnreadMentionsInThread(t *testing.T) {
 		*cfg.ServiceSettings.ThreadAutoFollow = true
 		*cfg.ServiceSettings.CollapsedThreads = model.COLLAPSED_THREADS_DEFAULT_ON
 	})
-	checkMentionCounts := func(client *model.Client4, userId string, expected map[string]int64) {
-		actual, resp2 := client.GetThreadMentionsForUserPerChannel(userId, th.BasicTeam.Id)
-		CheckNoError(t, resp2)
-		require.EqualValues(t, expected, actual)
-	}
 	checkThreadList := func(client *model.Client4, userId string, expectedMentions, expectedThreads int) (*model.Threads, *model.Response) {
 		uss, resp := client.GetUserThreads(userId, th.BasicTeam.Id, model.GetUserThreadsOpts{
 			Deleted: false,
@@ -5870,7 +5865,6 @@ func TestMaintainUnreadMentionsInThread(t *testing.T) {
 	// create reply and mention the original poster and another user
 	postAndCheck(t, th.SystemAdminClient, &model.Post{ChannelId: th.BasicChannel.Id, Message: "testReply @" + th.BasicUser.Username + " and @" + th.BasicUser2.Username, RootId: rpost.Id})
 
-	checkMentionCounts(Client, th.BasicUser.Id, map[string]int64{th.BasicChannel.Id: 1})
 	// basic user 1 was mentioned 1 time
 	checkThreadList(th.Client, th.BasicUser.Id, 1, 1)
 	// basic user 2 was mentioned 1 time
@@ -5899,7 +5893,6 @@ func TestMaintainUnreadMentionsInThread(t *testing.T) {
 	postAndCheck(t, th.SystemAdminClient, &model.Post{ChannelId: dm.Id, Message: "msg2", RootId: dm_root_post.Id})
 	// expect increment by two mentions
 	checkThreadList(th.Client, th.BasicUser.Id, 3, 2)
-	checkMentionCounts(Client, th.BasicUser.Id, map[string]int64{th.BasicChannel.Id: 1, dm.Id: 2})
 }
 
 func TestReadThreads(t *testing.T) {