[jit] Added a pass to transform aten::cat ops to prim::Concat op with variable number of inputs (#59881)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59881
This pass is not included in the JIT flow or anywhere else at this point. The idea is, once this lands, everyone can use this to test their workflow with this transformation and once we are convinced this is useful and/or improves performance, we can include it in the appropriate workflow.
Test Plan: Imported from OSS
Reviewed By: mrshenli
Differential Revision: D29277876
Pulled By: navahgar
fbshipit-source-id: b5be7bdcc98dced59295bd7b8f6627619cb58d41
