add CI job for phi-3-mini (#5532)

Summary:
This PR adds a CI job for phi-3-mini

Pull Request resolved: https://github.com/pytorch/executorch/pull/5532

Test Plan: The CI Job is green: https://github.com/pytorch/executorch/actions/runs/10967809307/job/30458161933?pr=5532

Reviewed By: iseeyuan

Differential Revision: D63157703

Pulled By: helunwencser

fbshipit-source-id: fc7f54e166062443f396e7a304712f7b60e5db90