Continue benchmark other models even if one fails to export (#6186)

Summary:
Fixes [T204330024](https://www.internalfb.com/intern/tasks/?t=204330024)

### Testing

https://github.com/pytorch/executorch/actions/runs/11310814159

Pull Request resolved: https://github.com/pytorch/executorch/pull/6186

Reviewed By: guangy10

Differential Revision: D64295995

Pulled By: huydhn

fbshipit-source-id: 570b5e6661e79cf5dfd0d0fdcc951cad3690b385