"Execution-only" Runtime

[hgaspar]

It should be possible to execute an migraphx compiled model, without needing a full migraphx installation, in particular without needing the machinery that parses onnx files, compiles models, etc... This feature calls for a very lean and minimal execution environment for migraphx.

A possible implementation: compile a model into a dynamic object, that exposes a "run" function, and well defined semantics for passing (or binding) input and output buffers.

This feature is meant to coexist with the "weight stripping" feature request, and also with the "dynamic loading of dependencies" feature request.