ci: use `-Cinstrument-coverage` instead of `-Zprofile` #1306

Job	Run time
cargo clippy -- -D warnings	17s
cargo fmt --all -- --check	9s
cargo check (ubuntu-latest)	24s
cargo check (macOS-latest)	14s
Code coverage (ubuntu-latest, nightly, --all-features)	8s
cargo check (windows-latest)	1m 42s
cargo test (ubuntu-latest)	33s
cargo test (macOS-latest)	44s
cargo test (windows-latest)	2m 55s
	7m 6s

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