Test

Refine backup concurrency #626

Job	Run time
test-backup-restore-api (docker-compose, standalone, L0)	16m 17s
test-backup-restore-api (docker-compose, standalone, L1)	11m 20s
test-backup-restore-cli (docker-compose, standalone, standalone)	3m 50s
test-backup-restore-with-custom-config (helm, standalone, milvus-backup)	5m 16s
test-backup-restore-cross-version (docker-compose, standalone, standalone)	3m 49s
test-backup-restore-with-custom-config (helm, standalone, milvus-bucket)	5m 2s
test-backup-restore-with-custom-config (helm, standalone, file, milvus-backup)	5m 5s
test-backup-restore-with-custom-config (helm, standalone, file, milvus-bucket)	5m 17s
test-backup-restore-cli (docker-compose, standalone, cluster)	3m 55s
test-backup-restore-cli (docker-compose, cluster, standalone)	3m 48s
test-backup-restore-cli (docker-compose, cluster, cluster)	3m 48s
	1h 7m 27s

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