test.test_concurrent_futures.test_deadlock test_pyrepl failed on 1-core-VM

Bug report

Bug description:

While working on reproducible builds for openSUSE (sponsored by the NLnet NGI0 fund), I found that our python313 package fails to build on 1-core-VMs from two failing tests.

Full build log: https://rb.zq1.de/other/python313/build-j1.log

2 re-run tests:
    test.test_concurrent_futures.test_deadlock test_pyrepl

2 tests failed:
    test.test_concurrent_futures.test_deadlock test_pyrepl

447 tests OK.

Total duration: 3 hour 35 sec
Total tests: run=42,874 (filtered) failures=7 skipped=1,745
Total test files: run=466/468 (filtered) failed=2 skipped=15 resource_denied=4 rerun=2

If those tests cannot pass in such an env, they should be skipped automatically.

CPython versions tested on:

3.13

Operating systems tested on:

Linux

首先检查链接的构建日志，并在单核 Linux VM 上复现 test.test_concurrent_futures.test_deadlock 和 test_pyrepl。确定这些失败是否仅出现在单核环境中，然后让受影响的测试在那里自动跳过；当测试在该环境中不再失败且更广泛的测试运行仍然有效时，即表示完成。