Unsubscribe channel after query node down

[xige-16]

fix issue: #15193
/kind bug
Signed-off-by: xige-16 [email protected]

[mergify]

@xige-16 E2e jenkins job failed, comment /run-checks can trigger the job again.

[mergify]

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

[mergify]

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

[mergify]

@xige-16 E2e jenkins job failed, comment /run-checks can trigger the job again.

[mergify]

@xige-16 E2e jenkins job failed, comment /run-checks can trigger the job again.

[codecov]

Codecov Report

Merging #15230 (da492d3) into master (1601a61) will decrease coverage by 0.48%.
The diff coverage is 73.36%.

@@            Coverage Diff             @@
##           master   #15230      +/-   ##
==========================================
- Coverage   80.12%   79.63%   -0.49%     
==========================================
  Files         445      450       +5     
  Lines       60829    61426     +597     
==========================================
+ Hits        48738    48918     +180     
- Misses       9787    10160     +373     
- Partials     2304     2348      +44     

Impacted Files	Coverage Δ
internal/indexcoord/meta_table.go	83.28% <ø> (+0.17%)	⬆️
internal/querynode/impl.go	72.25% <0.00%> (-1.45%)	⬇️
internal/rootcoord/root_coord.go	79.39% <25.00%> (-0.26%)	⬇️
internal/rootcoord/task.go	76.98% <42.85%> (-2.28%)	⬇️
internal/querycoord/task.go	80.01% <50.00%> (-1.03%)	⬇️
internal/querycoord/query_coord.go	78.85% <69.23%> (-0.35%)	⬇️
internal/querycoord/channel_unsubscribe.go	75.00% <75.00%> (ø)
internal/querycoord/meta.go	82.16% <93.22%> (+0.86%)	⬆️
internal/querycoord/cluster.go	81.70% <100.00%> (-0.31%)	⬇️
internal/querycoord/querynode.go	70.80% <100.00%> (-1.10%)	⬇️
... and 39 more

[mergify]

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

[mergify]

@xige-16 E2e jenkins job failed, comment /run-checks can trigger the job again.

[mergify]

@xige-16 E2e jenkins job failed, comment /run-checks can trigger the job again.

[mergify]

@xige-16 E2e jenkins job failed, comment /run-checks 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

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• internal/proto/OWNERS [czs007]
• internal/querycoord/OWNERS [czs007]
• internal/querynode/OWNERS [czs007]
• internal/util/OWNERS [czs007]

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[czs007]

/lgtm