store inside LoadDataController is not closed

[D3Hunter]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

if we init data store, we need close it later, but LoadDataController doesn't have a close method now

tidb/pkg/executor/importer/import.go

Line 984 in 7af21d4

func (e *LoadDataController) InitDataStore(ctx context.Context) error {

close of s3 is empty, but GCS store have something to close

tidb/br/pkg/storage/gcs.go

Lines 368 to 374 in 7af21d4

	func (s *GCSStorage) Close() {
	for _, client := range s.clients {
	if err := client.Close(); err != nil {
	log.Warn("failed to close gcs client", zap.Error(err))
	}
	}
	}

2. What did you expect to see? (Required)

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

master