Data races with frame objects

Bug report

We've fixed most of the data races with Python frame objects in:

• https://github.com/python/cpython/issues/128421

But I think we missed a few places, such as:

• repr(frame) on an frame that is executing or in the process of getting cleared
• frame.f_lasti
• Accessing variables through frame.f_locals

Additionally, I'd like to add more free threading tests for frames.

Linked PRs

• gh-144479
• gh-144546
• gh-145183
• gh-156037
• gh-156893
• gh-156973

從未勾選的 frame.f_locals 項目開始，查看與 frame-object race 工作相關的已連結 PRs。該 issue 沒有指明檔案或測試；完成表示解決剩餘的變數存取 race，並加入所要求的 free-threading frame 測試。