fix: db row close error be ignored

[drivebyer]

We should wrap error like:

postgres-operator/pkg/cluster/database.go

Lines 537 to 545 in a5663da

	defer func() {
	if err2 := rows.Close(); err2 != nil {
	if err != nil {
	err = fmt.Errorf("error when closing query cursor: %v, previous error: %v", err2, err)
	} else {
	err = fmt.Errorf("error when closing query cursor: %v", err2)
	}
	}
	}()

[FxKu]

👍

[hughcapet]

👍

[FxKu]

Thanks @drivebyer for your contribution!