ci: use `-Cinstrument-coverage` instead of `-Zprofile` #286

Job	Run time
cargo fmt --all -- --check	4s
cargo check (ubuntu-latest)	9s
cargo clippy -- -D warnings (ubuntu-latest)	9s
cargo check (macOS-latest)	13s
Code Coverage (ubuntu-latest, unix)	1m 49s
cargo clippy -- -D warnings (macOS-latest)	17s
cargo test (ubuntu-latest)	17s
Code Coverage (macos-latest, macos)	1m 42s
cargo check (windows-latest)	40s
cargo clippy -- -D warnings (windows-latest)	42s
cargo test (macOS-latest)	24s
Code Coverage (windows-latest, windows)	3m 36s
cargo test (windows-latest)	1m 33s
	11m 35s

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