Generate input types as ReadOnlyMemory<T> #4256

Job	Run time
build-packages	6m 33s
build-solution (Debug, x64)	8m 59s
build-solution (Debug, arm64)	9m 0s
build-solution (Release, x64)	9m 37s
build-solution (Release, arm64)	9m 9s
verify-packages (net7.0)	3m 47s
verify-packages (net6.0)	8m 50s
verify-packages (net472)	2m 16s
run-samples-aot	0s
run-samples	0s
run-tests-d3d12ma	0s
run-tests	0s
run-tests-win2d	0s
publish-nightlies-github	0s
publish-nightlies-azure-devops	0s
	58m 11s

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