[PR #8546/a561fa99 backport][3.10] Fix WebSocket server heartbeat timeout logic #4026

Job	Run time
Linter	59s
Generate llhttp sources	5s
Test (3.8, ubuntu, false)	7m 37s
Test (3.8, windows, false)	7m 43s
Test (3.8, Y, ubuntu, false)	7m 46s
Test (3.9, ubuntu, false)	8m 4s
Test (3.9, macos, false)	5m 28s
Test (3.9, windows, false)	7m 55s
Test (3.9, Y, ubuntu, false)	7m 27s
Test (3.10, ubuntu, false)	8m 13s
Test (3.10, macos, false)	6m 18s
Test (3.10, windows, false)	8m 22s
Test (3.10, Y, ubuntu, false)	7m 31s
Test (3.11, ubuntu, false)	7m 50s
Test (3.11, macos, false)	5m 42s
Test (3.11, windows, false)	9m 44s
Test (3.11, Y, ubuntu, false)	6m 30s
Test (3.12, ubuntu, false)	7m 11s
Test (3.12, macos, false)	5m 1s
Test (3.12, windows, false)	9m 16s
Test (3.12, Y, ubuntu, false)	6m 50s
Test (pypy-3.9, Y, ubuntu, false)	12m 0s
Test (ubuntu, 3.13, true, Y)	48s
check	4s
Pre-Deploy	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Tarball	0s
Deploy	0s
	2h 34m 24s

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