[compiler] Detect snake_case_ref as a ref-like name

[mdmower-csnw]

Summary

Update ref-like name regex to detect x_ref as a ref, similar to xRef.

How did you test this change?

A test fixture has been added to verify that custom_ref is detected as a ref when used in a useCallback hook.

[mdmower-csnw]

@gsathya - is this something you would be willing to consider as a small flexibility improvement on #29916?

[josephsavona]

I think we'd have to make this an extra feature flag. At Meta, we follow a convention of pascal case for regular JS variables and snake case for things that come from GraphQL, so -_ref is generally not a React ref.