Enable Vulkan tests in CI (#3737)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/3737

## Context

As title; enables Vulkan delegate to build and test during the unit test workflow.

imported-using-ghimport

Test Plan: Imported from OSS

Reviewed By: kirklandsign

Differential Revision: D57968974

Pulled By: SS-JIA

fbshipit-source-id: e63eb8b358bc11ae34de98b85ae83cec3a637705