Add an option to disable `realpath` when creating venv

These two lines of code sometimes make the executable path point somewhere unexpected:
https://github.com/python/cpython/blob/8b5ce31c2b44d9bf82e6119e90a52dd530bfd1db/Lib/venv/__init__.py#L210
https://github.com/python/cpython/blob/8b5ce31c2b44d9bf82e6119e90a52dd530bfd1db/Lib/venv/__init__.py#L240

Based on the following issue, realpath is necessary in some cases. However, there are situations where using "redirects, links or junctions" is intentional! For example, using subst to change drive letters or path for venv.
https://github.com/python/cpython/issues/89500

Would it be possible to add an option to disable the use of realpath during venv creation?

從 Lib/venv/init.py 中兩個相關的 realpath 呼叫開始，然後閱讀 issue 89500，以了解為什麼在某些情況下需要 realpath。確定在建立 venv 時應將選擇退出選項放在哪裡，以及如何繼續將現有行為作為預設行為。完成的標準是：有意設定的重新導向、連結或 junction 可以獲得保留，同時不會破壞現有行為所涵蓋的情況。