tests

Explicit pass the Python path to pipx in CI step #6015

Job	Run time
test_cygwin (39, windows-latest)	1m 13s
test (3.9, ubuntu-latest)	4s
collateral (diffcov)	1m 29s
test (3.9, windows-latest)	2s
collateral (docs)	1m 29s
test (3.13, ubuntu-latest)	5s
test (3.13, macos-latest)	6s
test (3.13, windows-latest)	2s
test (3.10, ubuntu-latest)	4s
test (3.11, ubuntu-latest)	5s
test (3.12, ubuntu-latest)	4s
test (3.14, ubuntu-latest)	5s
test (pypy3.10, ubuntu-latest, stdlib)	4s
test (ubuntu-latest, 3.10, stdlib)	3s
integration-test	0s
check	4s
release	1s
	5m 0s

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