[2.2.0]Fix graceful stop may not wait for the query goroutines done

[smellthemoon]

Signed-off-by: lixinguo [email protected] /kind improvement

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[yah01]

Does search has the same problem?

[smellthemoon]

Does search has the same problem?

Yes, have already modified it.

[smellthemoon]

rerun ut

[codecov[bot]]

Codecov Report

Merging #23093 (19774de) into 2.2.0 (7465804) will increase coverage by 0.01%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##            2.2.0   #23093      +/-   ##
==========================================
+ Coverage   80.95%   80.97%   +0.01%     
==========================================
  Files         717      717              
  Lines      100533   100531       -2     
==========================================
+ Hits        81389    81407      +18     
+ Misses      15973    15960      -13     
+ Partials     3171     3164       -7     

Impacted Files	Coverage Δ
internal/querynode/impl.go	66.26% <0.00%> (-0.40%)	:arrow_down:

... and 15 files with indirect coverage changes

[mergify[bot]]

@smellthemoon E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[stale[bot]]

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