gh-112536: Define `_Py_THREAD_SANITIZER` on GCC when TSan is enabled #108555

Job	Run time
Check for source changes	9s
Check if generated files are up to date	5m 4s
Docs	0s
Address sanitizer	8m 41s
Ubuntu SSL tests with OpenSSL (1.1.1w)	2m 1s
Hypothesis tests on Ubuntu	5m 28s
Ubuntu SSL tests with OpenSSL (3.0.13)	2m 7s
CIFuzz (address)	19m 30s
Ubuntu SSL tests with OpenSSL (3.1.5)	2m 6s
CIFuzz (undefined)	20m 44s
Ubuntu SSL tests with OpenSSL (3.2.1)	2m 7s
CIFuzz (memory)	22m 9s
Windows / build and test (x64)	15m 30s
Windows / build and test (x86)	15m 20s
Windows / build (arm64)	3m 11s
Windows (free-threading) / build (arm64)	3m 25s
Windows (free-threading) / build and test (x64)	25m 24s
Windows (free-threading) / build and test (x86)	28m 37s
macOS / build and test (macos-14)	6m 46s
macOS (free-threading) / build and test (macos-14)	8m 10s
macOS / build and test (macos-13)	8m 26s
Ubuntu / build and test	7m 9s
Thread sanitizer / Thread sanitizer	4m 24s
Ubuntu (free-threading) / build and test	9m 21s
Thread sanitizer (free-threading) / Thread sanitizer	7m 37s
WASI / build and test	12m 26s
All required checks pass	1s
	4h 5m 53s

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