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• Constant EMVC_ABI_VERSION is not exported, caused by an outdated bindgen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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

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

Additional details and impacted files

```diff @@ 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...