Port torch.outer method_tests() to OpInfos (#54798)
Summary:
An attempt to make an OpInfo-based test for torch.outer (aka toch.ger).
As a part of https://github.com/pytorch/pytorch/issues/54261 effort.
mruberry
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54798
Reviewed By: ngimel
Differential Revision: D27384891
Pulled By: mruberry
fbshipit-source-id: 0c90f84a388d2addc8de37d0c1713d8598211555
