[MM-16777] Migrate Team.MigrateTeamMembers to Sync by default (#11584)

* Migrate Team.MigrateTeamMembers to Sync by default

* Remove commented out MigrateTeamMembers function

* Remove return nil when no team members in query

* Return nil when no more team members in query

* Remove commented out code lines

* Format MigrateTeamMembers code

* Return some data from MigrateTeamMembers function

* Return data and error from MigrateTeamMembers

* Use result for consistency

* Control loop to allow loop to break in storetest/team_store.go

* Fix test MigrateTeamMembers test in storetest/team_store.go

* Change err to e in storetest/team_store.go

migrations/advanced_permissions_phase_2.go

@@ -71,19 +71,18 @@ func (worker *Worker) runAdvancedPermissionsPhase2Migration(lastDone string) (bo
 
 	if progress.CurrentTable == "TeamMembers" {
 		// Run a TeamMembers migration batch.
-		if result := <-worker.app.Srv.Store.Team().MigrateTeamMembers(progress.LastTeamId, progress.LastUserId); result.Err != nil {
-			return false, progress.ToJson(), result.Err
+		if result, err := worker.app.Srv.Store.Team().MigrateTeamMembers(progress.LastTeamId, progress.LastUserId); err != nil {
+			return false, progress.ToJson(), err
 		} else {
-			if result.Data == nil {
+			if result == nil {
 				// We haven't progressed. That means that we've reached the end of this stage of the migration, and should now advance to the next stage.
 				progress.LastUserId = strings.Repeat("0", 26)
 				progress.CurrentTable = "ChannelMembers"
 				return false, progress.ToJson(), nil
 			}
 
-			data := result.Data.(map[string]string)
-			progress.LastTeamId = data["TeamId"]
-			progress.LastUserId = data["UserId"]
+			progress.LastTeamId = result["TeamId"]
+			progress.LastUserId = result["UserId"]
 		}
 	} else if progress.CurrentTable == "ChannelMembers" {
 		// Run a ChannelMembers migration batch.