[PR #8611/1fcef940 backport][3.10] Fix handler waiting on shutdown #4216

Job	Run time
Linter	57s
Generate llhttp sources	10s
Test (3.8, ubuntu, false)	6m 7s
Test (3.8, windows, false)	6m 17s
Test (3.8, Y, ubuntu, false)	6m 39s
Test (3.9, ubuntu, false)	7m 24s
Test (3.9, macos, false)	4m 28s
Test (3.9, windows, false)	6m 51s
Test (3.9, Y, ubuntu, false)	5m 0s
Test (3.10, ubuntu, false)	6m 13s
Test (3.10, macos, false)	4m 32s
Test (3.10, windows, false)	7m 57s
Test (3.10, Y, ubuntu, false)	6m 14s
Test (3.11, ubuntu, false)	6m 18s
Test (3.11, macos, false)	4m 10s
Test (3.11, windows, false)	7m 6s
Test (3.11, Y, ubuntu, false)	7m 27s
Test (3.12, ubuntu, false)	5m 34s
Test (3.12, macos, false)	4m 16s
Test (3.12, windows, false)	7m 35s
Test (3.12, Y, ubuntu, false)	5m 58s
Test (pypy-3.9, Y, ubuntu, false)	11m 31s
Test (ubuntu, 3.13, true, Y)	3m 0s
check	2s
Pre-Deploy	0s
Tarball	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Deploy	0s
	2h 11m 46s

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