ps: support signal mask related fields #1750

Job	Run time
cargo test (ubuntu-latest)	1m 10s
cargo test (macOS-latest)	54s
Code Coverage (ubuntu-latest, unix)	2m 19s
cargo test (windows-latest)	2m 36s
cargo check (ubuntu-latest)	40s
cargo check (windows-latest)	2m 16s
cargo check (macOS-latest)	34s
Test each util separately (windows-latest)	3m 32s
Code Coverage (macos-latest, macos)	1m 52s
Code Coverage (windows-latest, windows)	4m 46s
Test each util separately (ubuntu-latest)	1m 7s
Test each util separately (macOS-latest)	51s
	22m 37s

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