ci: use `-Cinstrument-coverage` instead of `-Zprofile` #995

Job	Run time
cargo fmt --all -- --check	15s
cargo check (ubuntu-latest)	22s
cargo test (ubuntu-latest)	42s
cargo check (macOS-latest)	19s
Code Coverage (ubuntu-latest, unix)	1m 53s
cargo test (macOS-latest)	29s
cargo check (windows-latest)	2m 2s
Code Coverage (macos-latest, macos)	1m 42s
cargo test (windows-latest)	30s
Code Coverage (windows-latest, windows)	4m 35s
	12m 49s

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