enhance: Select L2 segments in L0Compaction as well (#32991)

/kind improvement

Signed-off-by: bigsheeper <[email protected]>

internal/datacoord/compaction.go

@@ -322,7 +322,6 @@ func (c *compactionPlanHandler) RefreshPlan(task *compactionTask) error {
 
  // Select sealed L1 segments for LevelZero compaction that meets the condition:
  // dmlPos < triggerInfo.pos
- // TODO: select L2 segments too
  sealedSegments := c.meta.SelectSegments(WithCollection(task.triggerInfo.collectionID), SegmentFilterFunc(func(info *SegmentInfo) bool {
  return (task.triggerInfo.partitionID == -1 || info.GetPartitionID() == task.triggerInfo.partitionID) &&
  info.GetInsertChannel() == plan.GetChannel() &&
@@ -339,7 +338,7 @@ func (c *compactionPlanHandler) RefreshPlan(task *compactionTask) error {
  sealedSegBinlogs := lo.Map(sealedSegments, func(info *SegmentInfo, _ int) *datapb.CompactionSegmentBinlogs {
  return &datapb.CompactionSegmentBinlogs{
  SegmentID: info.GetID(),
- Level: datapb.SegmentLevel_L1,
+ Level: info.GetLevel(),
  CollectionID: info.GetCollectionID(),
  PartitionID: info.GetPartitionID(),
  }