fix: Remove channel when create flowgraph timeout

[congqixia]

See also #33013

Signed-off-by: Congqi Xia [email protected]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 82.07%. Comparing base (293f14a) to head (8cae1be). Report is 7 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #33014      +/-   ##
==========================================
+ Coverage   82.06%   82.07%   +0.01%     
==========================================
  Files        1007     1007              
  Lines      127699   127702       +3     
==========================================
+ Hits       104793   104813      +20     
+ Misses      18931    18920      -11     
+ Partials     3975     3969       -6     

Files	Coverage Δ
internal/datanode/data_sync_service.go	67.88% <100.00%> (-0.39%)	:arrow_down:

... and 33 files with indirect coverage changes

[mergify[bot]]

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

[congqixia]

/run-cpu-e2e

[mergify[bot]]

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

[congqixia]

/run-cpu-e2e

[XuanYang-cn]

/lgtm /approve

[sre-ci-robot]

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