Fix message type of show partitions

[XuanYang-cn]

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

/kind improvement

[mergify]

@XuanYang-cn E2e jenkins job failed, comment /run-checks can trigger the job again.

[codecov]

Codecov Report

Merging #17821 (6371ee1) into master (9d2e5aa) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #17821      +/-   ##
==========================================
- Coverage   81.13%   81.09%   -0.04%     
==========================================
  Files         472      472              
  Lines       74917    74917              
==========================================
- Hits        60783    60755      -28     
- Misses      11459    11479      +20     
- Partials     2675     2683       +8     

Impacted Files	Coverage Δ
internal/proxy/task_search.go	62.54% <100.00%> (ø)
internal/mq/mqimpl/rocksmq/client/client_impl.go	77.96% <0.00%> (-4.24%)	⬇️
internal/proxy/channels_time_ticker.go	80.59% <0.00%> (-2.24%)	⬇️
internal/rootcoord/task.go	77.43% <0.00%> (-1.17%)	⬇️
internal/datacoord/segment_manager.go	84.98% <0.00%> (-0.91%)	⬇️
internal/mq/msgstream/mq_msgstream.go	78.64% <0.00%> (-0.87%)	⬇️
internal/querycoord/task.go	76.69% <0.00%> (-0.66%)	⬇️
internal/querycoord/index_checker.go	74.25% <0.00%> (-0.60%)	⬇️
internal/rootcoord/meta_table.go	80.60% <0.00%> (-0.33%)	⬇️
internal/proxy/util.go	86.42% <0.00%> (+0.71%)	⬆️
... and 2 more

[congqixia]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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