Move vela to a newer pin and remove patches we've merged upstream. (#2158)

Summary:
passes run.sh locally ready for ci fixes in https://github.com/pytorch/executorch/issues/2143. They can import in any order.

Pull Request resolved: https://github.com/pytorch/executorch/pull/2158

Reviewed By: mergennachin

Differential Revision: D54638819

Pulled By: digantdesai

fbshipit-source-id: 505cb8cf21af2961cbb39898e3a48209c79f8436