[3.13] gh-143641: Make `ready_to_import` always remove tempdir from `sys.path` (GH-143642) (#143648)

gh-143641: Make `ready_to_import` always remove tempdir from `sys.path` (GH-143642)

Make ready_to_import always remove tempdir from sys.path
(cherry picked from commit e7f5ffa0de2476828d78b8d39caefc38d797c206)

Co-authored-by: Jeong, YunWon <69878+youknowone@users.noreply.github.com>