Make all errors on an unsupported platform `ConfigurationError`s #7306

Job	Run time
Split workflow (ubuntu-latest, linked)	1m 31s
Split workflow (ubuntu-latest, default)	1m 28s
Split workflow (ubuntu-latest, nightly-latest)	1m 28s
Split workflow (macos-latest, default)	2m 30s
Split workflow (macos-latest, linked)	1m 36s
Split workflow (macos-latest, nightly-latest)	2m 16s
	10m 49s

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