Align aot_arm_compiler to latest export flow (#6327)

Summary:
- Update to_edge_transform_and_lower rather than export_to_edge
- fix channel last on some models

Pull Request resolved: https://github.com/pytorch/executorch/pull/6327

Reviewed By: mergennachin

Differential Revision: D64553412

Pulled By: digantdesai

fbshipit-source-id: 50c91a66e57900df1de62220d3bd95fa40860c9a