Enable tools to accept input args as IRPA files

[sogartar]

Request description

I want to be able to pass to iree-run-module and iree-benchmark-module input that is bfloat16. Numpy does not support this type.
I want to add support for consuming IRPA files. Would there be an objection supporting this?

There is also a comment that we may add pluggable support for different input types. Maybe it is a good time to add that as well.

What component(s) does this issue relate to?

Runtime

Additional context

No response

[benvanik]

you can pass that as a binary blob today ([email protected]) - that's the recommended path

IRPA files are key-value collections whereas numpy files and what we need in the tools are ordered lists - irpa files would only make sense with named entries and require more syntax - it could be useful, but it's more of a special case thing (you'd have to do [email protected]:some_key)