A few clippy fixes

[MatrixFrog]

These were flagged when trying to push to github

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	53,125	53,125	0
Passed	51,072	51,072	0
Ignored	1,482	1,482	0
Failed	571	571	0
Panics	0	0	0
Conformance	96.14%	96.14%	0.00%

Tested main commit: 8a1e8fe07f626f7a067afc2c9885d5d87de4bb5d
Tested PR commit: b131244064056ff6622326ca1067ece6639e0d08
Compare commits: 8a1e8fe...b131244

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.70%. Comparing base (6ddc2b4) to head (b131244).
⚠️ Report is 985 commits behind head on main.

Files with missing lines	Patch %	Lines
core/ast/src/expression/literal/object.rs	83.33%	2 Missing ⚠️
core/string/src/builder.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5424       +/-   ##
===========================================
+ Coverage   47.24%   62.70%   +15.45%     
===========================================
  Files         476      535       +59     
  Lines       46892    59083    +12191     
===========================================
+ Hits        22154    37047    +14893     
+ Misses      24738    22036     -2702     

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