Optimise the way tracemalloc and PyRefTracer hooks work

In https://github.com/python/cpython/issues/125703 @markshannon has raised that he is unhappy about the performance implications of where these hooks are placed and in a call we discussed that he has some ideas on how to make them more performant by moving them elsewhere or adapting then.

I am opening this issue to track and sync about these improvements for 3.14 and beyond.

沒有指定檔案或測試。首先閱讀 issue 125703 以及關於 tracemalloc 和 PyRefTracer hook 放置位置的相關討論，然後檢查相關的 CPython 執行階段程式碼和效能測量結果。這裡沒有定義完成的標準；在開始實作之前，該 issue 需要一個達成共識的方法和一個可測量的 3.14 效能目標。