Add first version of Buck build workflow (#75815)
Summary:
Next attempt after https://github.com/pytorch/pytorch/pull/75360 (that PR was reverted for breaking internal build because of BUCK file names conflicts).
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75815
Approved by: https://github.com/linbinyu
Test Plan: contbuild & OSS CI, see https://hud.pytorch.org/commit/pytorch/pytorch/de66304aa506091d16b266f4e13a777b6b6efad6
Reviewed By: mehtanirav
Differential Revision: D35679120
Pulled By: kit1980
fbshipit-source-id: 5544227c273418571d5c34b5f601fb9006463684
(cherry picked from commit 35b0b483d3c21d0e0ad49ddafac2f9e271af944c)
