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

Inizia da Lib/test/test_perf_profiler.py, concentrandoti sulla gestione da parte di setUp e tearDown dei file perf-*.map in /tmp. Esegui il test con l’esecuzione parallela, se disponibile, e verifica come vengono creati e ripuliti i file. Il lavoro è completato quando ogni test rimuove solo i file map che ha creato, senza eliminare i file appartenenti a test concorrenti.