Support for aliased import for encoding v1

[xunilrj]

Description

Fixes #6569

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 #6628 will degrade performances by 38.69%

_{Comparing xunilrj/encoding-auto-impl-aliased-import (a7ec3b0) with master (278bb8c)}

Summary

❌ 1 regressions
✅ 21 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	master	xunilrj/encoding-auto-impl-aliased-import	Change
❌	goto_definition	1.7 ms	2.7 ms	-38.69%

[IGI-111]

It's ugly but so was the original.
I sure hope we can get proper canonical paths soon and fixup the alias implementation.