Add IR inspection methods

[wllgrnt]

Motivation and Context

Adds the minimum viable code introspection tooling to Runtime - given a compiled Function, this will check the associated converter for functions with matching names and generate the string representations thereof. Will throw a ValueError if nothing is found (most likely because the relevant Function hasn't been run/compiled yet).

Approach

The ideal approach would add a method to the jit-compiled code (see numba's inspect_types), however this can't be done with the existing Entrypoint decorator as Functions don't implement the dict method, so setattr() doesn't work. A C++ method on the Functions would generate overhead for little gain. One workaround would be to implement a wrapper and masquerade such that the interpreter got access to a wrapped version of the Function with the associated utility methods, with the compiler ignoring this wrapper (credit to @guslonergan).

Further work - some equivalent of https://python-ast-explorer.com/ for the two ASTs, perhaps using ODB.

How Has This Been Tested?

Ran test script on a basic sum function with and without compilation, and checked the output.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[braxtonmckee]

can you maybe add some tests that verify that you can compile something, call this method, and then get a string back out?

[braxtonmckee]

definitely needs a test exercising the functionality