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