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?

从 Lib/venv/init.py 中两个相关的 realpath 调用开始，然后阅读 issue 89500，以了解为什么在某些情况下需要 realpath。确定在创建 venv 时应将选择退出选项放在哪里，以及如何继续将现有行为作为默认行为。完成的标准是：有意设置的重定向、链接或 junction 可以得到保留，同时不会破坏现有行为所涵盖的情况。