[ONNX] Fix cuda test case (#63597) (#64378)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/64378
* skip script test for unsupported autocast.
* Fix test case by adding missed `autocast` and `model.cuda()`.
Test Plan: Imported from OSS
Reviewed By: jansel
Differential Revision: D30919600
Pulled By: malfet
fbshipit-source-id: 3231fc672d97de487d6e4460626df0ba25f212ce
Co-authored-by: BowenBao <bowbao@microsoft.com>
