tests

Explicit pass the Python path to pipx in CI step #6018

Job	Run time
test_cygwin (39, windows-latest)	14m 48s
collateral (diffcov)	5m 5s
collateral (docs)	2m 11s
test (3.9, ubuntu-latest)	4m 30s
test (3.9, windows-latest)	10m 14s
test (3.13, ubuntu-latest)	4m 45s
test (3.13, macos-latest)	4m 18s
test (3.13, windows-latest)	12m 23s
test (3.10, ubuntu-latest)	4m 30s
test (3.11, ubuntu-latest)	4m 10s
test (3.12, ubuntu-latest)	5m 10s
test (3.14, ubuntu-latest)	6m 22s
test (pypy3.10, ubuntu-latest, stdlib)	17m 27s
test (ubuntu-latest, 3.10, stdlib)	4m 26s
integration-test	0s
check	3s
release	0s
	1h 40m 22s

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