Bug(sqlstore): fix issue with postgres unable to find existing main organization (#73789)

* SQLStore: fix issue where postgres would not find the existing org

Grafana using a postgres databases would fail to find the created org when the CreatedAt and UpdatedAt times are (inaccurately) populated. This issue only occurs in postgres, and only shows up when getOrCreateOrg run to create the admin user AND the organization already exists. See https://github.com/grafana/grafana/issues/71781 for more information and a reproduction.

* add an integration test

pkg/services/sqlstore/user.go

@@ -146,8 +146,6 @@ func verifyExistingOrg(sess *DBSession, orgId int64) error {
 
 func (ss *SQLStore) getOrCreateOrg(sess *DBSession, orgName string) (int64, error) {
 	var org org.Org
-	org.Created = time.Now()
-	org.Updated = org.Created
 
 	if ss.Cfg.AutoAssignOrg {
 		has, err := sess.Where("id=?", ss.Cfg.AutoAssignOrgId).Get(&org)
@@ -167,6 +165,8 @@ func (ss *SQLStore) getOrCreateOrg(sess *DBSession, orgName string) (int64, erro
 		}
 
 		org.Name = mainOrgName
+		org.Created = time.Now()
+		org.Updated = org.Created
 		org.ID = int64(ss.Cfg.AutoAssignOrgId)
 		if err := sess.InsertId(&org, ss.Dialect); err != nil {
 			ss.log.Error("failed to insert organization with provided id", "org_id", org.ID, "err", err)
@@ -178,6 +178,8 @@ func (ss *SQLStore) getOrCreateOrg(sess *DBSession, orgName string) (int64, erro
 		}
 	} else {
 		org.Name = orgName
+		org.Created = time.Now()
+		org.Updated = org.Created
 		if _, err := sess.InsertOne(&org); err != nil {
 			return 0, err
 		}