cargo-c support #1396

Job	Run time
cargo-c	37s
Clippy	14s
Build+test (clang, stable, ubuntu-latest)	1m 0s
Clang Tidy	7s
Clippy nightly (optional)	18s
Build+test (clang, beta, ubuntu-latest)	52s
Build+test (clang, nightly, ubuntu-latest)	47s
Check for documentation errors	32s
Build+test (clang, 1.61.0, ubuntu-latest)	4m 54s
ensure-header-updated	1m 3s
Build+test (gcc, stable, ubuntu-latest)	52s
Format	12s
Build+test (gcc, beta, ubuntu-latest)	45s
Check minimum versions	40s
Build+test (gcc, nightly, ubuntu-latest)	46s
Miri	46s
Build+test (gcc, 1.61.0, ubuntu-latest)	4m 42s
Windows	2m 26s
Build+test (macos-latest, clang, stable)	1m 17s
Windows CMake, Debug configuration	1m 40s
Windows CMake, Release configuration	1m 56s
Valgrind	56s
	27m 22s

Provide feedback