enhance: Reduce the frequency of index ralted logs

[xiaocai2333]

issue: #33001

[mergify]

@xiaocai2333

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.11%. Comparing base (0e5765b) to head (fcc9542).
Report is 34 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #33050      +/-   ##
==========================================
+ Coverage   82.05%   82.11%   +0.06%     
==========================================
  Files        1007     1005       -2     
  Lines      127668   128105     +437     
==========================================
+ Hits       104757   105198     +441     
+ Misses      18929    18926       -3     
+ Partials     3982     3981       -1     

Files	Coverage Δ
internal/datacoord/index_service.go	94.88% <100.00%> (-0.03%)	⬇️

... and 66 files with indirect coverage changes

[czs007]

/approve
/lgtm

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