gh-74929: Implement PEP 667 #110408

Job	Run time	Billable time
Check for source changes	8s	0s
Check if generated files are up to date	4m 44s	0s
Address sanitizer	10m 15s	0s
Ubuntu SSL tests with OpenSSL (1.1.1w)	2m 10s	0s
Hypothesis tests on Ubuntu	5m 40s	0s
Ubuntu SSL tests with OpenSSL (3.0.13)	2m 9s	0s
Ubuntu SSL tests with OpenSSL (3.1.5)	2m 9s	0s
Ubuntu SSL tests with OpenSSL (3.2.1)	1m 57s	0s
CIFuzz (address)	19m 24s	0s
CIFuzz (undefined)	20m 52s	0s
CIFuzz (memory)	22m 5s	0s
macOS (free-threading) / build and test (macos-14)	9m 51s	0s
Ubuntu / build and test	7m 3s	0s
Ubuntu (free-threading) / build and test	10m 17s	0s
Windows / build and test (x64)	15m 32s	0s
Windows / build (arm64)	2m 53s	0s
Windows / build and test (x86)	15m 1s	0s
Windows (free-threading) / build and test (x86)	21m 8s	0s
Windows (free-threading) / build and test (x64)	21m 21s	0s
Windows (free-threading) / build (arm64)	2m 4s	0s
macOS / build and test (macos-14)	6m 46s	0s
Thread sanitizer / Thread sanitizer	4m 24s	0s
macOS / build and test (macos-13)	8m 40s	0s
Thread sanitizer (free-threading) / Thread sanitizer	6m 58s	0s
WASI / build and test	13m 38s	0s
Docs / Docs (Oldest Sphinx)	1m 53s	0s
Docs / Docs	2m 7s	0s
Docs / Doctest	14m 49s	0s
All required checks pass	1s	0s
	4h 15m 59s	0s

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