no redundant allocation in text decoder via ArrayBuffer::data()

[zhuzhu81998]

This Pull Request fixes #4362 .

Following the suggestion from @HalidOdat in #4358 .

Note that for Utf16Be, the decode function does in place swapping and thus requires mutability.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	52,862	52,862	0
Passed	49,472	49,472	0
Ignored	2,249	2,249	0
Failed	1,141	1,141	0
Panics	0	0	0
Conformance	93.59%	93.59%	0.00%

[zhuzhu81998]

Just saw the work in #4650 , #4637, #4631 that all target basically the same area for different issues. And all of them still use the allocating version.
@jedel1043 it would make sense to at least merge #4631 first so that others can rebase?

[jedel1043]

Thank you for the contribution! Everything looks good, I just had a suggestion for the detached error message.

[jedel1043]

I'll merge this first. #4631 needs another review pass.
EDIT: scratch this, seems like that PR got fixed sooner than I expected 😅

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.58%. Comparing base (6ddc2b4) to head (349c401).
⚠️ Report is 661 commits behind head on main.

Files with missing lines	Patch %	Lines
core/runtime/src/text/mod.rs	66.66%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4670      +/-   ##
==========================================
+ Coverage   47.24%   56.58%   +9.33%     
==========================================
  Files         476      548      +72     
  Lines       46892    60066   +13174     
==========================================
+ Hits        22154    33988   +11834     
- Misses      24738    26078    +1340     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.