Fix some bugs and add full_meta #322

Job	Run time
test-backup-restore-cross-version (docker-compose, standalone, standalone)	4m 24s
test-backup-restore-cli (docker-compose, standalone, standalone)	4m 13s
test-backup-restore-cli (docker-compose, standalone, cluster)	4m 31s
test-backup-restore-cli (docker-compose, cluster, standalone)	4m 32s
test-backup-restore-cli (docker-compose, cluster, cluster)	4m 22s
test-backup-restore-api (docker-compose, standalone)	40m 56s
test-backup-restore-api (docker-compose, cluster)	43m 45s
test-backup-restore-api (helm, standalone)	45m 30s
test-backup-restore-with-custom-config (helm, standalone, milvus-backup)	5m 21s
test-backup-restore-with-custom-config (helm, standalone, milvus-bucket)	5m 39s
test-backup-restore-with-custom-config (helm, standalone, file, milvus-backup)	5m 22s
test-backup-restore-with-custom-config (helm, standalone, file, milvus-bucket)	6m 5s
	2h 54m 40s

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