Move test_libtorch from win-test2 to win-test1 group (#35540)
Summary:
Let see if it makes both test branches a bit more balanced
Pull Request resolved: https://github.com/pytorch/pytorch/pull/35540
Test Plan: CI
Differential Revision: D20704642
Pulled By: malfet
fbshipit-source-id: 4e2ab5a80adfe78620206d4eaea30207194379cc
