gh-117021: Fix integer overflow in PyLong_AsPid() on non-Windows 64-b… #53

Job	Run time
i686-pc-windows-msvc/msvc (Debug)	17m 32s
i686-pc-windows-msvc/msvc (Release)	21m 39s
x86_64-pc-windows-msvc/msvc (Debug)	17m 57s
x86_64-pc-windows-msvc/msvc (Release)	22m 7s
aarch64-pc-windows-msvc/msvc (Debug)	4m 53s
aarch64-pc-windows-msvc/msvc (Release)	5m 50s
x86_64-apple-darwin/clang (Debug)	18m 57s
x86_64-apple-darwin/clang (Release)	20m 35s
aarch64-apple-darwin/clang (Debug)	10m 34s
aarch64-apple-darwin/clang (Release)	13m 6s
x86_64-unknown-linux-gnu/gcc (Debug)	8m 40s
x86_64-unknown-linux-gnu/gcc (Release)	17m 19s
x86_64-unknown-linux-gnu/clang (Debug)	9m 21s
x86_64-unknown-linux-gnu/clang (Release)	13m 33s
aarch64-unknown-linux-gnu/gcc (Debug)	1h 0m 14s
aarch64-unknown-linux-gnu/gcc (Release)	48m 11s
aarch64-unknown-linux-gnu/clang (Debug)	58m 13s
aarch64-unknown-linux-gnu/clang (Release)	31m 55s
	6h 40m 36s

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