Ensure IPython's HistoryManager threads don't leak #4082

Job	Run time
check_release	45s
Test Lint	47s
link_check	3m 56s
Test Minimum Versions	3m 6s
Test Prereleases	17m 52s
Make SDist	27s
test_without_debugpy (ubuntu-latest, 3.9)	2m 34s
test_docs	51s
build (ubuntu-latest, 3.12)	2m 27s
build (ubuntu-latest, 3.9)	47s
build (ubuntu-latest, 3.10)	2m 56s
build (ubuntu-latest, pypy-3.9)	56s
build (ubuntu-latest, 3.11)	2m 18s
build (ubuntu-latest, pypy-3.10)	31s
build (windows-latest, 3.11)	3m 13s
build (macos-latest, 3.9)	38s
build (ubuntu-latest, 3.13)	2m 30s
build (windows-latest, 3.12)	4m 41s
build (windows-latest, pypy-3.10)	7m 49s
build (windows-latest, 3.10)	4m 1s
build (macos-latest, 3.13)	2m 36s
build (macos-latest, pypy-3.10)	5m 18s
build (macos-latest, 3.10)	2m 56s
build (macos-latest, 3.12)	2m 33s
build (windows-latest, pypy-3.9)	1m 28s
build (windows-latest, 3.13)	4m 40s
build (macos-latest, 3.11)	2m 25s
build (windows-latest, 3.9)	1m 53s
build (macos-latest, pypy-3.9)	34s
Install from SDist and Test	2m 12s
coverage	-1s
	1h 29m 39s

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