Fix flush panic after compaction

[XuanYang-cn]

See also: #18565

Signed-off-by: yangxuan xuan.yang@zilliz.com

[mergify]

@XuanYang-cn ut workflow job failed, comment rerun ut can trigger the job again.

[mergify]

@XuanYang-cn ut workflow job failed, comment rerun ut can trigger the job again.

[XuanYang-cn]

rerun ut

[codecov]

Codecov Report

Merging #18677 (a294ea6) into master (be933a7) will increase coverage by 0.04%.
The diff coverage is 90.62%.

@@            Coverage Diff             @@
##           master   #18677      +/-   ##
==========================================
+ Coverage   82.42%   82.47%   +0.04%     
==========================================
  Files         520      520              
  Lines       80430    80444      +14     
==========================================
+ Hits        66293    66343      +50     
+ Misses      11256    11223      -33     
+ Partials     2881     2878       -3     

Impacted Files	Coverage Δ
internal/datanode/segment_replica.go	92.55% <ø> (ø)
internal/datanode/flow_graph_delete_node.go	94.17% <90.62%> (+10.92%)	⬆️
internal/querycoord/segment_allocator.go	83.75% <0.00%> (-1.25%)	⬇️
internal/indexcoord/meta_table.go	93.72% <0.00%> (-1.13%)	⬇️
internal/log/zap_text_encoder.go	83.17% <0.00%> (-0.71%)	⬇️
internal/datacoord/meta.go	87.53% <0.00%> (-0.65%)	⬇️
internal/indexcoord/index_coord.go	81.56% <0.00%> (-0.42%)	⬇️
internal/datacoord/services.go	85.74% <0.00%> (-0.31%)	⬇️
internal/rootcoord/root_coord.go	76.46% <0.00%> (+0.07%)	⬆️
internal/datacoord/segment_manager.go	84.21% <0.00%> (+0.27%)	⬆️
... and 8 more

[XuanYang-cn]

/assign @congqixia

[congqixia]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia, XuanYang-cn

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