Informative error message for platforms that do not support federated #3540

Job	Run time
check-diff / check	18s
check-labels / check	3s
building / build-toolchain (ubuntu-latest)	5m 45s
lsp / test-lsp (ubuntu-latest)	4m 21s
cli / test-cli (ubuntu-latest)	5m 20s
	15m 47s

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