Stabilize ABI errors

[IGI-111]

Description

Stabilize the error_type feature.
Fixes #6765

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
  • If my change requires substantial documentation changes, I have requested support from the DevRel team
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[codspeed-hq]

CodSpeed Performance Report

Merging #7241 will not alter performance

_{Comparing IGI-111/abi_errors (a8cb65d) with master (1ac3514)}

Summary

✅ 24 untouched benchmarks

[ironcev]

Thanks for taking this over @IGI-111! It's always quite some repetitive work to promote an experimental feature.