enhance: [2.4] Fix typo of clustering key not loaded msg (#35948)

[congqixia]

Cherry-pick from master
pr: #35948
Related to #35415

[sre-ci-robot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.90%. Comparing base (6158ad3) to head (00f17da).
Report is 3 commits behind head on 2.4.

Additional details and impacted files

@@            Coverage Diff             @@
##              2.4   #36000      +/-   ##
==========================================
- Coverage   71.92%   71.90%   -0.02%     
==========================================
  Files        1057     1057              
  Lines      139105   139105              
==========================================
- Hits       100051   100027      -24     
- Misses      34779    34798      +19     
- Partials     4275     4280       +5     

Files with missing lines	Coverage Δ
internal/proxy/meta_cache.go	92.88% <100.00%> (ø)

... and 28 files with indirect coverage changes

[weiliu1031]

/lgtm