Support for u16 and u32 items in the data section

[Dentosal]

Description

Requires #7085

Adds initial support for u16 and u32 items in the data section, taking the first step in using the new LQW/LHW/SQW/SHW instructions to acheve smaller output binaries. Sadly this is unable to compress constants in the code, as they require addressing changes (probbly related to #7281).

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 #7271 will not alter performance

_{Comparing dento/u16-u32-data (efd91b5) with master (74092cb)}

Summary

✅ 25 untouched benchmarks