Fix rust bindings generation

[iamyulong]

Description

This PR fixes two issues with the rust bindings:

• Constant EMVC_ABI_VERSION is not exported, caused by an outdated bindgen
• Enums are not properly rustified, due to invalid configuration.

Testing

I've run cargo test for the whole workspace and cargo build for the example-rust-vm.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.49%. Comparing base (f89284f) to head (544fece).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #707   +/-   ##
=======================================
  Coverage   93.49%   93.49%           
=======================================
  Files          25       25           
  Lines        3861     3861           
  Branches      396      396           
=======================================
  Hits         3610     3610           
  Misses        139      139           
  Partials      112      112           

[chfast]

Oh great. This explains why I'm also seeing this problems locally...