Support C federated tests with Rust RTI #38

Job	Run time
check-labels / check	2s
check-diff / check	16s
lsp / test-lsp (ubuntu-latest)	7m 43s
cli / test-cli (ubuntu-latest)	3m 5s
building / build-toolchain (ubuntu-latest)	1m 16s
lsp / test-lsp (macos-latest)	13m 41s
cli / test-cli (macos-latest)	4m 12s
building / build-toolchain (macos-latest)	1m 40s
lsp / test-lsp (windows-latest)	13m 55s
cli / test-cli (windows-latest)	4m 44s
building / build-toolchain (windows-latest)	1m 42s
building / epoch / build-epoch	8m 2s
	1h 0m 18s

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