Allow in graph einops operators (#99478)
Coordinating with @arogozhnikov from einops team, allowing specific operators in the dynamo graph avoids dynamo tracing problems provided the operators are screened for safety - they must not bake in unintended constants or take data-dependent control flow paths.
Fixes #99031
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99478
Approved by: https://github.com/jansel
