[3.11] GH-95815: Document less specific error for os.remove (GH-99571) (#99641)

GH-95815: Document less specific error for os.remove (GH-99571)

os.remove can raise PermissionError instead of IsADirectoryError,
when the object to be removed is a directory (in particular on
macOS).

This reverts a change done in GH-14262.
(cherry picked from commit 1cae31d26ba621f6b1f0656ad3d69a0236338bad)

Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>

Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>