Add option to use different reference arrays for derived test classes #307

Job	Run time
tests / Load tox environments	5s
tests / py311-test-pytest73 (macos-latest)	37s
tests / py312-test-pytest74 (windows-latest)	1m 23s
tests / py39-test-pytest60 (macos-latest)	51s
tests / py39-test-pytestoldest (windows-latest)	2m 0s
tests / codestyle (ubuntu-latest)	19s
tests / py313-test-devdeps (ubuntu-latest)	1m 21s
tests / py310-test-pytest62 (ubuntu-latest)	46s
tests / py310-test-pytest70 (macos-latest)	1m 2s
tests / py310-test-pytest71 (windows-latest)	1m 13s
tests / py39-test-pytest61 (windows-latest)	2m 3s
tests / py311-test-pytest72 (ubuntu-latest)	39s
tests / py39-test-pytest53 (ubuntu-latest)	53s
tests / py313-test-pytest90 (ubuntu-latest)	44s
tests / py313-test-pytest83 (ubuntu-latest)	51s
publish	0s
	14m 47s

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