Enable ProactorEventLoop on windows for ipykernel #4236

Job	Run time
test_docs	56s
link_check	3m 47s
Test Minimum Versions	2m 34s
Test Prereleases	2m 40s
Test Lint	48s
check_release	1m 38s
test_without_debugpy (ubuntu-latest, 3.10)	2m 17s
Make SDist	24s
build (macos-latest, qt5, 3.14)	2m 59s
build (ubuntu-latest, qt6, 3.11)	2m 47s
build (windows-latest, qt6, 3.13)	4m 6s
build (macos-latest, qt6, 3.12)	3m 17s
build (windows-latest, qt5, 3.14)	4m 17s
build (macos-latest, qt6, pypy-3.11)	4m 23s
build (ubuntu-latest, qt5, pypy-3.11)	3m 33s
build (windows-latest, qt5, pypy-3.11)	4m 43s
build (ubuntu-latest, qt5, 3.14)	2m 34s
build (macos-latest, qt5, 3.10)	3m 20s
build (windows-latest, qt6, 3.10)	4m 37s
build (macos-latest, qt6, 3.13)	4m 19s
build (ubuntu-latest, qt5, 3.10)	2m 38s
build (macos-latest, qt5, pypy-3.11)	4m 47s
build (ubuntu-latest, qt6, 3.10)	2m 49s
build (ubuntu-latest, qt6, 3.12)	2m 45s
build (windows-latest, qt6, pypy-3.11)	4m 44s
build (macos-latest, qt6, 3.10)	4m 1s
build (windows-latest, qt6, 3.11)	4m 32s
build (ubuntu-latest, qt6, pypy-3.11)	3m 31s
build (macos-latest, qt6, 3.11)	3m 30s
build (ubuntu-latest, qt6, 3.13)	2m 51s
build (windows-latest, qt5, 3.10)	4m 7s
build (windows-latest, qt6, 3.12)	4m 14s
Install from SDist and Test	2m 49s
coverage	1s
	1h 47m 18s

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