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ca7ec23198
When delete by partition_key, Milvus will generates L0 segments globally. During L0 Compaction, those L0 segments will touch all partitions collection wise. Due to the false-positive rate of segment bloomfilters, L0 compactions will append false deltalogs to completed irrelevant partitions, which causes *partition deletion amplification. This PR uses partition_key to set targeted partitionID when producing deleteMsgs into MsgStreams. This'll narrow down L0 segments scope to partition level, and remove the false-positive influence collection-wise. However, due to DeleteMsg structure, we can only label one partition to one deleteMsg, so this enhancement fails if user wants to delete over 2 partition_keys in one deletion. See also: #34665 Signed-off-by: yangxuan <xuan.yang@zilliz.com>