[StaticRuntime] Add aten::narrow (#48991)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48991
Add native impl of `aten::narrow` to skip dispatcher, because `aten::narrow` calls `aten::slice` in its implementation, here we reduce the dispatcher overhead by two-fold by calling the native impl of `aten::slice`.
Reviewed By: bwasti
Differential Revision: D25387119
fbshipit-source-id: c020da2556a35bc57a8a2e21fa45dd491ea516a0
