refactor(tests): split and improve snapshot test infrastructure #228

Job	Run time
Test (namespace-profile-mac-default, x86_64-apple-darwin)	2m 5s
Test (namespace-profile-mac-default, aarch64-apple-darwin)	55s
Lint	1m 28s
Test (windows-latest, x86_64-pc-windows-msvc)	4m 32s
Test (ubuntu-latest, x86_64-unknown-linux-gnu)	3m 40s
done	4s
	12m 44s

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