MM-23015: Enable or disable group mentions (#14010)

* MM-23015: Enable or disable group mentions + show them in suggestion list


Co-authored-by: Catalin Tomai <catalin.tomai@mattermost.com>

store/timer_layer.go

@@ -2990,6 +2990,22 @@ func (s *TimerLayerGroupStore) GetGroupsByChannel(channelId string, opts model.G
 	return resultVar0, resultVar1
 }
 
+func (s *TimerLayerGroupStore) GetGroupsAssociatedToChannelsByTeam(teamId string, opts model.GroupSearchOpts) (map[string][]*model.GroupWithSchemeAdmin, *model.AppError) {
+	start := timemodule.Now()
+
+	resultVar0, resultVar1 := s.GroupStore.GetGroupsAssociatedToChannelsByTeam(teamId, opts)
+
+	elapsed := float64(timemodule.Since(start)) / float64(timemodule.Second)
+	if s.Root.Metrics != nil {
+		success := "false"
+		if resultVar1 == nil {
+			success = "true"
+		}
+		s.Root.Metrics.ObserveStoreMethodDuration("GroupStore.GetGroupsAssociatedToChannelsByTeam", success, elapsed)
+	}
+	return resultVar0, resultVar1
+}
+
 func (s *TimerLayerGroupStore) GetGroupsByTeam(teamId string, opts model.GroupSearchOpts) ([]*model.GroupWithSchemeAdmin, *model.AppError) {
 	start := timemodule.Now()