Enable ProactorEventLoop on windows for ipykernel #4191

Job	Run time
Make SDist	30s
link_check	2m 1s
check_release	1m 38s
Test Prereleases	2m 37s
Test Minimum Versions	2m 46s
test_without_debugpy (ubuntu-latest, 3.10)	2m 27s
Test Lint	1m 8s
test_docs	51s
build (ubuntu-latest, qt6, 3.12)	2m 52s
build (ubuntu-latest, qt6, 3.11)	2m 37s
build (ubuntu-latest, qt6, 3.10)	2m 38s
build (ubuntu-latest, qt5, 3.10)	2m 40s
build (ubuntu-latest, qt5, pypy-3.11)	3m 35s
build (ubuntu-latest, qt5, 3.14)	2m 37s
build (windows-latest, qt5, 3.10)	4m 34s
build (windows-latest, qt5, 3.14)	3m 53s
build (ubuntu-latest, qt6, pypy-3.11)	3m 34s
build (windows-latest, qt5, pypy-3.11)	5m 36s
build (windows-latest, qt6, 3.11)	4m 17s
build (windows-latest, qt6, 3.10)	3m 57s
build (macos-latest, qt5, 3.10)	3m 15s
build (macos-latest, qt5, 3.14)	2m 38s
build (windows-latest, qt6, pypy-3.11)	5m 28s
build (windows-latest, qt6, 3.12)	4m 53s
build (ubuntu-latest, qt6, 3.13)	2m 44s
build (macos-latest, qt6, 3.12)	2m 59s
build (macos-latest, qt5, pypy-3.11)	4m 10s
build (windows-latest, qt6, 3.13)	3m 55s
build (macos-latest, qt6, 3.13)	2m 46s
build (macos-latest, qt6, 3.11)	2m 36s
build (macos-latest, qt6, 3.10)	2m 59s
build (macos-latest, qt6, pypy-3.11)	4m 15s
Install from SDist and Test	2m 23s
coverage	9s
	1h 41m 58s

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