Checkout release branch rather then commit_hash when building triton release (#115379) (#121901)
Cherry pick of https://github.com/pytorch/pytorch/pull/115379 from Release 2.2 that should be applied to main and Release 2.3 as well
Pull Request resolved: https://github.com/pytorch/pytorch/pull/121901
Approved by: https://github.com/DanilBaibak, https://github.com/jeanschmidt
