hang instead of pthread_exit during interpreter shutdown #12408

Job	Run time
fmt	24s
resolve	3s
check-msrv	53s
semver-checks	40s
clippy/aarch64-apple-darwin/stable	48s
clippy/x86_64-unknown-linux-gnu/stable	45s
clippy/aarch64-unknown-linux-gnu/stable	46s
clippy/powerpc64le-unknown-linux-gnu/stable	30s
careful	0s
clippy/s390x-unknown-linux-gnu/stable	38s
python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }} rust-${{ matrix.rust }}	0s
clippy/wasm32-wasip1/stable	46s
clippy/x86_64-pc-windows-msvc/stable	31s
coverage windows-latest	34s
clippy/i686-pc-windows-msvc/stable	30s
coverage macos-latest	42s
docsrs	0s
clippy/x86_64-unknown-linux-gnu/beta	45s
Free threaded tests - ubuntu-latest	50s
valgrind	0s
Free threaded tests - macos-latest	40s
coverage ubuntu-latest	51s
Free threaded tests - windows-latest	40s
check-feature-powerset ${{ matrix.rust }}	0s
emscripten	0s
test-cross-compilation ${{ matrix.os }} -> ${{ matrix.target }}	0s
test-cross-compilation-windows	0s
test-debug	0s
test-version-limits	0s
python3.12-x64 ubuntu-latest rust-nightly / build	1s
python3.12-x64 macos-13 rust-stable / build	51s
python3.12-arm64 macos-latest rust-stable / build	2s
python3.12-arm64 ubuntu-22.04-arm rust-stable / build	16s
python3.12-x64 ubuntu-latest rust-stable / build	1s
python3.12-x86 windows-latest rust-stable / build	1s
python3.12-x64 windows-latest rust-stable / build	1s
conclusion	1s
	13m 30s

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