[ci.yml] Improve conditions for nosetest installations #2723

Job	Run time
Linter	28s
Select tests from inputs	1s
Run tests (ubuntu-20.04, 2.7, cpython, core, sh)	1m 28s
Run tests (ubuntu-20.04, 3.2, cpython, core, sh)	4m 16s
Run tests (ubuntu-20.04, 3.5, cpython, core, sh)	1m 9s
Run tests (ubuntu-20.04, 3.9, cpython, core, sh)	1m 4s
Run tests (ubuntu-20.04, 3.11, cpython, core, sh)	1m 9s
Run tests (ubuntu-20.04, pypy-2.7, cpython, core, sh)	2m 59s
Run tests (ubuntu-20.04, pypy-3.6, cpython, core, sh)	4m 15s
Run tests (ubuntu-20.04, pypy-3.7, cpython, core, sh)	4m 28s
Run tests (windows-2019, 3.4, cpython, core, bat)	2m 59s
Run tests (windows-2019, 3.4, cpython, nodownload, bat)	1m 41s
Run tests (ubuntu-20.04, 2.7, jython, core, sh)	4m 5s
Run tests (ubuntu-20.04, 2.7, jython, nodownload, sh)	46s
	30m 48s

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