[MM-14253] Adds channels and users to the bulk index process (#10434)

* [MM-14253] Adds channels and users to the bulk index process

* Add support for PostgreSQL and sort the user query result

* Add tests for user and channel batch queries

* Fix test times

model/user.go

@@ -103,6 +103,18 @@ type UserAuth struct {
 	AuthService string  `json:"auth_service,omitempty"`
 }
 
+type UserForIndexing struct {
+	Id          string   `json:"id"`
+	Username    string   `json:"username"`
+	Nickname    string   `json:"nickname"`
+	FirstName   string   `json:"first_name"`
+	LastName    string   `json:"last_name"`
+	CreateAt    int64    `json:"create_at"`
+	DeleteAt    int64    `json:"delete_at"`
+	TeamsIds    []string `json:"team_id"`
+	ChannelsIds []string `json:"channel_id"`
+}
+
 func (u *User) DeepCopy() *User {
 	copyUser := *u
 	if u.AuthData != nil {