fix: Close leaked health check kafka producer

[congqixia]

Related to #36822

[sre-ci-robot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.91%. Comparing base (e4b6773) to head (b82c6ad).
Report is 9 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (e4b6773) and HEAD (b82c6ad). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (e4b6773)	HEAD (b82c6ad)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #37728       +/-   ##
===========================================
- Coverage   80.66%   68.91%   -11.76%     
===========================================
  Files        1357      290     -1067     
  Lines      190714    25470   -165244     
===========================================
- Hits       153843    17553   -136290     
+ Misses      31438     7917    -23521     
+ Partials     5433        0     -5433     

Components	Coverage Δ
Client	∅ <ø> (∅)
Core	68.91% <ø> (ø)
Go	∅ <ø> (∅)

see 1067 files with indirect coverage changes

[czs007]

/lgtm

[congqixia]

only on master branch