Make all errors on an unsupported platform `ConfigurationError`s #4598

Job	Run time
Diagnostic export (ubuntu-latest, nightly-latest)	1m 22s
Diagnostic export (macos-latest, nightly-latest)	1m 39s
Diagnostic export (ubuntu-latest, linked)	1m 26s
Diagnostic export (windows-latest, linked)	3m 3s
Diagnostic export (windows-latest, nightly-latest)	3m 25s
Diagnostic export (macos-latest, linked)	2m 28s
	13m 23s

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