Service accounts: Same Org fix migration to account for duplicate entries (#84349)

* bug: fix migration to account for duplicate entries

* refactoring to create test folder for user migrations

* fix migration log

* added the migration

* additional tests

* added extSrv tests

pkg/services/sqlstore/migrations/user/test/user_test.go

@@ -0,0 +1,55 @@
+package test
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+	"gopkg.in/ini.v1"
+	"xorm.io/xorm"
+
+	"github.com/grafana/grafana/pkg/infra/log"
+	"github.com/grafana/grafana/pkg/services/sqlstore/migrations"
+	"github.com/grafana/grafana/pkg/services/sqlstore/migrator"
+	"github.com/grafana/grafana/pkg/services/sqlstore/sqlutil"
+	"github.com/grafana/grafana/pkg/setting"
+)
+
+// Setup users
+var (
+	now = time.Now()
+)
+
+func setupTestDB(t *testing.T) *xorm.Engine {
+	t.Helper()
+	dbType := sqlutil.GetTestDBType()
+	testDB, err := sqlutil.GetTestDB(dbType)
+	require.NoError(t, err)
+
+	t.Cleanup(testDB.Cleanup)
+
+	x, err := xorm.NewEngine(testDB.DriverName, testDB.ConnStr)
+	require.NoError(t, err)
+
+	t.Cleanup(func() {
+		if err := x.Close(); err != nil {
+			fmt.Printf("failed to close xorm engine: %v", err)
+		}
+	})
+
+	err = migrator.NewDialect(x.DriverName()).CleanDB(x)
+	require.NoError(t, err)
+
+	mg := migrator.NewMigrator(x, &setting.Cfg{
+		Logger: log.New("users.test"),
+		Raw:    ini.Empty(),
+	})
+	migrations := &migrations.OSSMigrations{}
+	migrations.AddMigration(mg)
+
+	err = mg.Start(false, 0)
+	require.NoError(t, err)
+
+	return x
+}