Don't remove nodeInfo when querycoord panic at loadBalanceTask

[xige-16]

fix issue: #14077
/kind bug
Signed-off-by: xige-16 [email protected]

[mergify]

@xige-16 ut workflow job failed, comment rerun ut can trigger the job again.

[czs007]

/lgtm
/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: czs007, xige-16

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[codecov]

Codecov Report

Merging #15189 (700547a) into master (008e08a) will decrease coverage by 0.03%.
The diff coverage is 16.66%.

@@            Coverage Diff             @@
##           master   #15189      +/-   ##
==========================================
- Coverage   80.18%   80.15%   -0.04%     
==========================================
  Files         445      445              
  Lines       60800    60805       +5     
==========================================
- Hits        48753    48736      -17     
- Misses       9748     9772      +24     
+ Partials     2299     2297       -2     

Impacted Files	Coverage Δ
internal/querycoord/task.go	81.23% <16.66%> (-0.27%)	⬇️
internal/querycoord/channel_allocator.go	97.56% <0.00%> (-2.44%)	⬇️
internal/querynode/query_collection.go	81.14% <0.00%> (-0.85%)	⬇️
internal/datacoord/server.go	71.91% <0.00%> (-0.60%)	⬇️
internal/proxy/impl.go	83.99% <0.00%> (-0.50%)	⬇️
internal/indexcoord/meta_table.go	83.11% <0.00%> (-0.26%)	⬇️
internal/indexcoord/index_coord.go	79.37% <0.00%> (+0.29%)	⬆️
...nternal/util/rocksmq/client/rocksmq/client_impl.go	78.15% <0.00%> (+0.84%)	⬆️
internal/indexnode/indexnode_mock.go	84.84% <0.00%> (+1.13%)	⬆️
internal/datacoord/segment_manager.go	82.81% <0.00%> (+2.74%)	⬆️