gh-124176: `create_autospec` must not change how dataclass defaults are mocked #128866

Job	Run time
Change detection / Compute changed files	9s
Check if generated files are up to date	4m 4s
Windows MSI${{ '' }}	0s
Docs	0s
Address sanitizer	9m 7s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.0.15)	1m 58s
Hypothesis tests on Ubuntu	5m 31s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.1.7)	2m 11s
CIFuzz	0s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.2.3)	2m 10s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.3.2)	2m 16s
Thread sanitizer / Thread sanitizer	4m 2s
Thread sanitizer (free-threading) / Thread sanitizer	7m 21s
WASI / build and test	6m 14s
Windows / build (arm64)	3m 20s
Windows (free-threading) / build (arm64)	3m 20s
Windows / build and test (Win32)	16m 23s
Windows (free-threading) / build and test (Win32)	24m 14s
Windows / build and test (x64)	15m 43s
Windows (free-threading) / build and test (x64)	23m 3s
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	12m 22s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	14m 24s
macOS / build and test (macos-13)	8m 39s
Ubuntu / build and test (ubuntu-22.04)	7m 0s
Ubuntu (free-threading) / build and test (ubuntu-22.04)	9m 35s
All required checks pass	1s
	3h 3m 7s

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