Add property for optional runner #806

Job	Run time
linters (3.9, ubuntu-latest)	39s
Testing on Python 3.8 (ubuntu-latest)	57s
Testing on Python 3.8 (macos-13)	1m 16s
Testing on Python 3.8 (windows-2019)	2m 52s
Testing on Python 3.9 (ubuntu-latest)	53s
Testing on Python 3.9 (macos-13)	1m 40s
Testing on Python 3.9 (windows-2019)	2m 37s
Testing on Python 3.10 (ubuntu-latest)	1m 0s
Testing on Python 3.10 (macos-13)	1m 35s
Testing on Python 3.10 (windows-2019)	2m 39s
Testing on Python 3.11 (ubuntu-latest)	45s
Testing on Python 3.11 (macos-13)	1m 36s
Testing on Python 3.11 (windows-2019)	2m 43s
	21m 12s

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