Implement getter for ArrayBuffer data

[HalidOdat]

Implements .data() and .data_mut() for getting a reference to the internal byte data of ArrayBuffer without having to detach the buffer.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	95,960	95,960	0
Passed	76,594	76,594	0
Ignored	18,477	18,477	0
Failed	889	889	0
Panics	0	0	0
Conformance	79.82%	79.82%	0.00%

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (ced2904) 47.44% compared to head (1bed26a) 47.43%.
Report is 2 commits behind head on main.

❗ Current head 1bed26a differs from pull request most recent head 308f78d. Consider uploading reports for the commit 308f78d to get more accurate results

Files	Patch %	Lines
core/engine/src/object/builtins/jsarraybuffer.rs	0.00%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3610      +/-   ##
==========================================
- Coverage   47.44%   47.43%   -0.02%     
==========================================
  Files         475      475              
  Lines       46036    46046      +10     
==========================================
  Hits        21841    21841              
- Misses      24195    24205      +10     

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[jedel1043]

Everything looks perfect!

[nekevss]

Looks good to me