gh-117657: TSAN Fix races in `PyMember_Get` and `PyMember_Set`, for C extensions #131411

Job	Run time
Change detection / Compute changed files	9s
Check if generated files are up to date	3m 25s
Check if Autoconf files are up to date	1m 2s
Docs	0s
Address sanitizer (ubuntu-22.04)	9m 19s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.0.15)	2m 31s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.1.7)	2m 27s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.2.3)	2m 16s
CIFuzz (address)	18m 58s
Windows MSI${{ '' }}	0s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.3.2)	2m 12s
CIFuzz (undefined)	21m 4s
CIFuzz (memory)	20m 31s
Hypothesis tests on Ubuntu	5m 28s
Thread sanitizer / Thread sanitizer	4m 22s
Thread sanitizer (free-threading) / Thread sanitizer	7m 22s
WASI / build and test	6m 5s
Windows / build (arm64)	2m 53s
Windows (free-threading) / build (arm64)	3m 1s
Windows / build and test (Win32)	16m 13s
Windows (free-threading) / build and test (Win32)	23m 47s
Windows (free-threading) / build and test (x64)	23m 4s
Windows / build and test (x64)	15m 12s
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	5m 32s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	4m 39s
macOS / build and test (macos-13)	11m 38s
Ubuntu / build and test (ubuntu-22.04)	7m 21s
Ubuntu (free-threading) / build and test (ubuntu-22.04)	10m 18s
All required checks pass	2s
	3h 50m 51s

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