[3.13] gh-127906: Backport test_cppext changes from main #135530

Job	Run time
Change detection / Compute changed files	12s
Check if generated files are up to date	4m 58s
Check if Autoconf files are up to date	21s
Check if the ABI has changed	1m 29s
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.0.15)	2m 28s
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.1.7)	2m 29s
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.2.3)	2m 52s
Windows MSI${{ '' }}	0s
Docs	0s
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.3.2)	2m 33s
Hypothesis tests on Ubuntu	5m 44s
Address sanitizer (ubuntu-24.04)	9m 31s
CIFuzz	0s
WASI / build and test	11m 22s
Thread sanitizer / Thread sanitizer	3m 11s
Thread sanitizer (free-threading) / Thread sanitizer	7m 35s
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	6m 59s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	4m 31s
macOS / build and test (macos-13)	9m 21s
Ubuntu / build and test (ubuntu-24.04)	8m 7s
Ubuntu (free-threading) / build and test (ubuntu-24.04)	11m 19s
Ubuntu / build and test (ubuntu-24.04-aarch64)	8m 0s
Ubuntu (free-threading) / build and test (ubuntu-24.04-aarch64)	9m 34s
Windows / build and test (arm64)	2m 59s
Windows (free-threading) / build and test (arm64)	3m 8s
Windows / build and test (Win32)	15m 37s
Windows / build and test (x64)	15m 25s
Windows (free-threading) / build and test (x64)	21m 42s
All required checks pass	2s
	2h 51m 29s

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