Enhance channel manager ut

[XuanYang-cn]

Resolves: #17676

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

/kind improvement

[mergify]

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

[XuanYang-cn]

rerun ut

[mergify]

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

[XuanYang-cn]

rerun ut

[codecov]

Codecov Report

Merging #17682 (5411936) into master (746aeea) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #17682      +/-   ##
==========================================
- Coverage   81.01%   80.98%   -0.03%     
==========================================
  Files         468      468              
  Lines       74414    74414              
==========================================
- Hits        60286    60264      -22     
- Misses      11446    11466      +20     
- Partials     2682     2684       +2     

Impacted Files	Coverage Δ
internal/mq/mqimpl/rocksmq/client/client_impl.go	77.96% <0.00%> (-1.70%)	⬇️
internal/querycoord/querynode.go	72.03% <0.00%> (-1.28%)	⬇️
internal/distributed/datacoord/client/client.go	69.41% <0.00%> (-1.23%)	⬇️
internal/querycoord/index_checker.go	74.25% <0.00%> (-0.60%)	⬇️
internal/querycoord/cluster.go	79.61% <0.00%> (-0.59%)	⬇️
internal/proxy/impl.go	89.56% <0.00%> (-0.50%)	⬇️
internal/querycoord/task.go	77.28% <0.00%> (-0.43%)	⬇️
internal/indexcoord/meta_table.go	82.93% <0.00%> (-0.25%)	⬇️
internal/querycoord/task_scheduler.go	78.68% <0.00%> (-0.24%)	⬇️
internal/rootcoord/meta_table.go	81.00% <0.00%> (+0.08%)	⬆️
... and 6 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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