[Merged by Bors] - Rust 1.68 clippy fixes

[nekevss]

This Pull Request addresses the broken cargo clippy lints that is currently causing CI to fail.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	94,181	94,181	0
Passed	71,951	71,950	-1
Ignored	17,218	17,218	0
Failed	5,012	5,013	+1
Panics	12	12	0
Conformance	76.40%	76.40%	-0.00%

Broken tests (1):

test/built-ins/RegExp/named-groups/duplicate-names-test.js (previously Passed)

[codecov]

Codecov Report

Merging #2646 (98b2ff0) into main (718fea3) will increase coverage by 0.03%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #2646      +/-   ##
==========================================
+ Coverage   49.51%   49.55%   +0.03%     
==========================================
  Files         388      386       -2     
  Lines       39312    39237      -75     
==========================================
- Hits        19467    19445      -22     
+ Misses      19845    19792      -53     

Impacted Files	Coverage Δ
boa_engine/src/builtins/map/ordered_map.rs	76.92% <ø> (ø)
...ine/src/object/internal_methods/integer_indexed.rs	0.00% <ø> (ø)
boa_engine/src/object/internal_methods/string.rs	31.25% <0.00%> (ø)
boa_parser/src/lexer/string.rs	82.51% <100.00%> (ø)

... and 12 files with indirect coverage changes

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[nekevss]

bors r+

[bors]

Pull request successfully merged into main.

Build succeeded:

• Build and Test (macos-latest)
• Build and Test (windows-latest)
• Coverage
• Misc