fix: avoid misleading wait hook change logs

[Jayant-kernel]

Ⅰ. Describe what this PR does

This PR avoids a misleading debug log in the generic WaitReconciler.

Previously, WaitReconciler.Reconcile logged object with wait hook changed for every observed object update, even when no wait hook existed for that object. The log now happens only after the matching wait hook is found, immediately before the hook check runs.

A regression test covers both cases:

• no matching wait hook: no object with wait hook changed log is emitted;
• matching wait hook: the log is emitted once.

Ⅱ. Does this pull request fix one issue?

Fixes #571

Ⅲ. Describe how to verify it

The focused test is:

go test -count=1 ./pkg/cache/controllers -run 'TestCacheSandboxWaitReconciler_(Reconcile|LogsObjectChangedOnlyWithWaitHook)$'

I could not run the Go test locally because the local Windows environment blocks the available Go binary from executing. The change is limited to the wait-hook log path and its regression test; GitHub CI should run the package tests.

Ⅳ. Special notes for reviews

No API, CRD, generated code, or behavior outside debug logging is changed.

[kruise-bot]

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[Jayant-kernel]

@AiRanthem review my pr

[AiRanthem]

@Jayant-kernel plz fix your UT

[AiRanthem]

Your unit tests are too messy. Please keep AI-generated code concise and high-quality.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.78%. Comparing base (901921b) to head (1903b36).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #573   +/-   ##
=======================================
  Coverage   79.78%   79.78%           
=======================================
  Files         202      202           
  Lines       14688    14689    +1     
=======================================
+ Hits        11719    11720    +1     
  Misses       2544     2544           
  Partials      425      425           

Flag	Coverage Δ
unittests	79.78% <100.00%> (+<0.01%)	⬆️

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[Jayant-kernel]

@AiRanthem
Sorry for the mess , i cleaned the unit test