test: add testcases for bm25 function #1261

Job	Run time
test-backup-restore-cli (docker-compose, standalone, standalone)	2m 13s
test-backup-restore-with-custom-config (helm, standalone, milvus-backup)	6m 8s
test-backup-restore-cli (docker-compose, standalone, cluster)	2m 12s
test-backup-restore-after-upgrade (docker-compose, standalone, standalone, v2.3.12, master-latest)	2m 57s
test-backup-restore-cross-version (docker-compose, standalone, standalone, 2.2.0-latest, master-l...	3m 26s
test-backup-restore-with-custom-config (helm, standalone, milvus-bucket)	6m 9s
test-backup-restore-after-upgrade (docker-compose, standalone, standalone, v2.3.12, 2.3-latest)	3m 25s
test-backup-restore-cli (docker-compose, cluster, standalone)	2m 27s
test-backup-restore-with-custom-config (helm, standalone, file, milvus-backup)	6m 8s
test-backup-restore-cross-version (docker-compose, standalone, standalone, 2.2.0-latest, 2.4-latest)	3m 59s
test-backup-restore-after-upgrade (docker-compose, standalone, standalone, 2.3-latest, master-lat...	3m 2s
test-backup-restore-with-custom-config (helm, standalone, file, milvus-bucket)	6m 7s
test-backup-restore-cli (docker-compose, cluster, cluster)	2m 25s
test-backup-restore-cross-version (docker-compose, standalone, standalone, 2.3-latest, master-lat...	3m 7s
test-backup-restore-after-upgrade (docker-compose, standalone, standalone, 2.3-latest, 2.3-latest)	3m 19s
test-backup-restore-cross-version (docker-compose, standalone, standalone, 2.3-latest, 2.4-latest)	3m 52s
test-backup-restore-api	0s
	1h 0m 56s

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