Allow ldc opcode in predicates

[ironcev]

Description

This PR allows LDC opcode in predicates. Historically, it was not allowed in the FuelVM, but this restriction is removed and we are removing it now from Sway as well.

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 #6964 will not alter performance

_{Comparing ironcev/allow-ldc-in-predicates (80bf645) with master (a090937)}

Summary

✅ 22 untouched benchmarks