[MM-37898] Exclude bots from initial user store emptiness check (#18139)

* Exclude bots from initial user store emptiness check

* Add test

store/sqlstore/user_store.go

@@ -2004,10 +2004,26 @@ func (us SqlUserStore) GetKnownUsers(userId string) ([]string, error) {
 }
 
 // IsEmpty returns whether or not the Users table is empty.
-func (us SqlUserStore) IsEmpty() (bool, error) {
+func (us SqlUserStore) IsEmpty(excludeBots bool) (bool, error) {
 	var hasRows bool
-	err := us.GetReplica().SelectOne(&hasRows, `SELECT EXISTS (SELECT 1 FROM Users)`)
+
+	builder := us.getQueryBuilder().
+		Select("1").
+		Prefix("SELECT EXISTS (").
+		From("Users")
+
+	if excludeBots {
+		builder = builder.LeftJoin("Bots ON Users.Id = Bots.UserId").Where("Bots.UserId IS NULL")
+	}
+
+	builder = builder.Suffix(")")
+
+	query, args, err := builder.ToSql()
 	if err != nil {
+		return false, errors.Wrapf(err, "users_is_empty_to_sql")
+	}
+
+	if err = us.GetReplica().SelectOne(&hasRows, query, args...); err != nil {
 		return false, errors.Wrap(err, "failed to check if table is empty")
 	}
 	return !hasRows, nil