Revert "src: modernize cleanup queue to use c++20"

[richardlau]

This reverts commit 581b444.

Refs: #56063

---

Fixes failing Test Linux workflow.

../src/cleanup_queue.cc:18:32: error: 'greater' may not intend to support class template argument deduction [-Werror,-Wctad-maybe-unsupported]
   18 |   std::ranges::sort(callbacks, std::greater());
      |                                ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/bits/stl_function.h:390:12: note: add a deduction guide to suppress this warning
  390 |     struct greater : public binary_function<_Tp, _Tp, bool>
      |            ^
1 error generated.

[github-actions]

Fast-track has been requested by @richardlau. Please 👍 to approve.

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.20%. Comparing base (6857dbc) to head (fb46c4e).
Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
src/cleanup_queue.cc	88.88%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #56846      +/-   ##
==========================================
+ Coverage   88.70%   89.20%   +0.50%     
==========================================
  Files         663      663              
  Lines      192012   192012              
  Branches    36613    36933     +320     
==========================================
+ Hits       170317   171287     +970     
+ Misses      14520    13609     -911     
+ Partials     7175     7116      -59     

Files with missing lines	Coverage Δ
src/cleanup_queue-inl.h	92.30% <ø> (ø)
src/cleanup_queue.h	100.00% <ø> (ø)
src/cleanup_queue.cc	85.71% <88.88%> (ø)

... and 93 files with indirect coverage changes

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/64895/

[nodejs-github-bot]

Landed in ad84558