[jit] Added a new operator for concat that takes in variadic parameters (#59880)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/59880
Test Plan: Imported from OSS
Reviewed By: mrshenli
Differential Revision: D29277877
Pulled By: navahgar
fbshipit-source-id: 6db24e7432f683a1d1466f9778201e0aa5d3b1ad
