gh-87063: Add `closed` attribute to multiprocessing.Process #130466

Job	Run time
Change detection / Compute changed files	9s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.0.15)	2m 28s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.1.7)	2m 0s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.2.3)	1m 53s
Check if Autoconf files are up to date	27s
Check if generated files are up to date	2m 25s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.3.2)	1m 53s
Address sanitizer	2m 28s
Hypothesis tests on Ubuntu	2m 28s
Windows MSI${{ '' }}	0s
CIFuzz	0s
Thread sanitizer / Thread sanitizer	2m 29s
Thread sanitizer (free-threading) / Thread sanitizer	2m 27s
WASI / build and test	2m 28s
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	2m 20s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	2m 17s
macOS / build and test (macos-13)	2m 27s
Ubuntu / build and test (ubuntu-22.04)	2m 27s
Ubuntu (free-threading) / build and test (ubuntu-22.04)	2m 27s
Windows / build (arm64)	2m 12s
Windows / build and test (Win32)	2m 11s
Windows (free-threading) / build (arm64)	2m 11s
Windows (free-threading) / build and test (Win32)	2m 12s
Windows / build and test (x64)	2m 13s
Windows (free-threading) / build and test (x64)	2m 9s
Docs / Docs	1m 49s
Docs / Doctest	2m 26s
Docs / Docs (Oldest Sphinx)	2m 5s
All required checks pass	4s
	55m 5s

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