4.x: Unit test lambdaification 1 of N

[akarnokd]

Will go over the unit tests in ASCII order of the classpath and classes.

Search regexp: new \w+\s*\([^)]*\)\s*\{

/* NFI */ = Not Functional Interface so break the regexp pattern

If you complain instead of proposing a PR about "why not convert to method references" you'll be banned.

Related: #8080

[github-actions]

🐷 TruffleHog + Entropy Beauty Scan

Average entropy of changed code: 5.085 bits/char
Verdict: ⚠️ Consider review — entropy outside sweet spot

Changed files entropy:

.github/workflows/gradle_branch.yml: 5.084
.github/workflows/gradle_pr.yml: 4.934
.github/workflows/gradle_preview_jdks.yml: 5.137
.github/workflows/gradle_release.yml: 5.212
.github/workflows/gradle_snapshot.yml: 5.060

✅ No secrets or suspicious high-entropy strings found.

Mid-4 beauty heuristic in action — powered by our entropy chats! 😊

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.77%. Comparing base (58c9ed7) to head (d46c953).
⚠️ Report is 1 commits behind head on 4.x.

Additional details and impacted files

@@             Coverage Diff              @@
##                4.x    #8137      +/-   ##
============================================
- Coverage     98.80%   98.77%   -0.03%     
+ Complexity     6872     6871       -1     
============================================
  Files           769      769              
  Lines         48659    48659              
  Branches       6516     6516              
============================================
- Hits          48076    48063      -13     
- Misses          451      458       +7     
- Partials        132      138       +6     

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