test_perf_profiler: race condition when cleaning up perf-*.map files

Bug report

Bug description:

What happens

Lib/test/test_perf_profiler.py uses setUp/tearDown to record all perf-*.map files in /tmp at test start, then deletes any new ones at the end.

When tests run in parallel (make -j, CI runners, pytest-xdist), one test deletes map files belonging to another test → race condition.

This causes:

• Flaky test failures
• Leftover /tmp/perf-*.map files
• Unreliable CI results

What should happen

Each test should only delete the perf-*.map file(s) it created, regardless of other concurrent processes.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-141593

從 Lib/test/test_perf_profiler.py 開始，重點關注其 setUp 和 tearDown 對 /tmp 中 perf-*.map 檔案的處理。如果支援平行執行，請以平行方式執行測試，並檢查檔案的建立與清理方式。完成的標準是每個測試只刪除它建立的 map 檔案，而不會刪除屬於並行測試的檔案。