Dynamic shape support in Vulkan Backend (#2367)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/2367

## Context

This changeset exposes API functions to the `ComputeGraph` class that allow inputs to be resized, and for the resizing to propagate through the graph via re-calculation of output shapes.
ghstack-source-id: 218429131
exported-using-ghexport

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Reviewed By: jorgep31415

Differential Revision: D54754546

fbshipit-source-id: c312eb04849f8b9c1e3dea22ac427c76e34b9dd5