[v9.0.x] Auth: Case insensitive ids duplicate usagestats (#51240)

* merged and backport to 9.0

* implement the missing method GetDialect for sqlStore

* Add back mockstore missing methods

pkg/services/sqlstore/mockstore/mockstore.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/services/sqlstore"
+	"github.com/grafana/grafana/pkg/services/sqlstore/migrator"
 )
 
 type OrgListResponse []struct {
@@ -75,6 +76,10 @@ func (m *SQLStoreMock) GetSystemStats(ctx context.Context, query *models.GetSyst
 	return m.ExpectedError
 }
 
+func (m *SQLStoreMock) GetDialect() migrator.Dialect {
+	return nil
+}
+
 func (m *SQLStoreMock) DeleteExpiredSnapshots(ctx context.Context, cmd *models.DeleteExpiredSnapshotsCommand) error {
 	return m.ExpectedError
 }