[Merged by Bors] - Reduced boilerplate code in the parser

[Razican]

This PR adds an OrAbrupt trait, with the or_abrupt() function. This function is equivalent to the previous ?.ok_or(ParseError::AbruptEnd), but it's cleaner. It's implemented for the parser cursor results types.

It also adds an advance() function to the parser cursor (which might be possible to optimize further), that just advances the cursor without returning any token. This shows a clearer intent in many places where it's being used.

I also used ParseResult in more places, since we were not using it in many places.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	93,789	93,789	0
Passed	69,500	69,500	0
Ignored	18,422	18,422	0
Failed	5,867	5,867	0
Panics	0	0	0
Conformance	74.10%	74.10%	0.00%

[codecov]

Codecov Report

Merging #2410 (5438162) into main (8e14d76) will increase coverage by 0.31%.
The diff coverage is 61.07%.

❗ Current head 5438162 differs from pull request most recent head 4e78079. Consider uploading reports for the commit 4e78079 to get more accurate results

@@            Coverage Diff             @@
##             main    #2410      +/-   ##
==========================================
+ Coverage   38.41%   38.72%   +0.31%     
==========================================
  Files         313      313              
  Lines       23974    23874     -100     
==========================================
+ Hits         9210     9246      +36     
+ Misses      14764    14628     -136     

Impacted Files	Coverage Δ
boa_engine/src/syntax/parser/error.rs	44.44% <ø> (ø)
...rser/expression/assignment/async_arrow_function.rs	0.00% <0.00%> (ø)
...syntax/parser/expression/assignment/conditional.rs	50.00% <0.00%> (-3.85%)	⬇️
...src/syntax/parser/expression/left_hand_side/mod.rs	62.50% <0.00%> (ø)
boa_engine/src/syntax/parser/expression/mod.rs	40.21% <0.00%> (-2.12%)	⬇️
.../parser/expression/primary/class_expression/mod.rs	0.00% <0.00%> (ø)
...oa_engine/src/syntax/parser/statement/block/mod.rs	41.46% <0.00%> (-0.21%)	⬇️
...ngine/src/syntax/parser/statement/break_stm/mod.rs	58.82% <0.00%> (-5.89%)	⬇️
...ne/src/syntax/parser/statement/continue_stm/mod.rs	60.00% <0.00%> (-5.00%)	⬇️
...gine/src/syntax/parser/statement/return_stm/mod.rs	62.50% <0.00%> (-6.25%)	⬇️
... and 108 more

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[raskad]

Great changes!

[HalidOdat]

Looks perfect to me!

[HalidOdat]

bors r+

[bors]

Pull request successfully merged into main.

Build succeeded:

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