fix: panic when double close channel of broadcaster ack

[chyezh]

issue: #45635

[sre-ci-robot]

[ci-v2-notice] Notice: We are gradually rolling out the new ci-v2 system.

• Legacy CI jobs remain unaffected, you can just ignore ci-v2 if you don't want to run it.
• Additional "ci-v2/*" checkers will run for this PR to ensure the new ci-v2 system is working as expected.
• For tests that exist in both v1 and v2, passing in either system is considered PASS.

To rerun ci-v2 checks, comment with:

• /ci-rerun-code-check // for ci-v2/code-check
• /ci-rerun-build // for ci-v2/build
• /ci-rerun-ut-integration // for ci-v2/ut-integration
• /ci-rerun-ut-go // for ci-v2/ut-go
• /ci-rerun-ut-cpp // for ci-v2/ut-cpp
• /ci-rerun-ut // for all ci-v2/ut-integration, ci-v2/ut-go, ci-v2/ut-cpp
• /ci-rerun-e2e-arm // for ci-v2/e2e-arm

If you have any questions or requests, please contact @zhikunyao.

[codecov[bot]]

Codecov Report

:x: Patch coverage is 87.50000% with 3 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 76.49%. Comparing base (947c885) to head (92447f3). :warning: Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...treamingcoord/server/broadcaster/broadcast_task.go	70.00%	2 Missing and 1 partial :warning:

:x: Your project status has failed because the head coverage (76.49%) is below the target coverage (77.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #45636      +/-   ##
==========================================
- Coverage   76.51%   76.49%   -0.02%     
==========================================
  Files        1875     1875              
  Lines      292805   292526     -279     
==========================================
- Hits       224039   223772     -267     
+ Misses      61337    61319      -18     
- Partials     7429     7435       +6     

Components	Coverage Δ
Client	78.17% <ø> (ø)
Core	83.19% <ø> (ø)
Go	74.60% <87.50%> (-0.03%)	:arrow_down:

Files with missing lines	Coverage Δ
...coord/server/broadcaster/ack_callback_scheduler.go	73.91% <100.00%> (+1.39%)	:arrow_up:
...amingcoord/server/broadcaster/broadcast_manager.go	71.98% <100.00%> (-1.45%)	:arrow_down:
...ingcoord/server/broadcaster/resource_key_locker.go	100.00% <100.00%> (ø)
pkg/util/paramtable/component_param.go	97.61% <100.00%> (ø)
...treamingcoord/server/broadcaster/broadcast_task.go	78.08% <70.00%> (-0.44%)	:arrow_down:

... and 30 files with indirect coverage changes

:rocket: New features to boost your workflow:

• :snowflake: Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[chyezh]

/ci-rerun-ut-go

[chyezh]

/ci-rerun-ut-go

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chyezh, czs007

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

The pull request process is described here

Needs approval from an approver in each of these files:

• ~~internal/streamingcoord/OWNERS~~ [czs007]
• ~~pkg/util/OWNERS~~ [czs007]

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment

[mergify[bot]]

@chyezh Thanks for your contribution. Please submit with DCO, see the contributing guide https://github.com/milvus-io/milvus/blob/master/CONTRIBUTING.md#developer-certificate-of-origin-dco.

[sre-ci-robot]

New changes are detected. LGTM label has been removed.