Cleanup get_option and calls to the function

[jedel1043]

I saw that #3277 provided better error messages when an option is required, instead of our current method of returning a generic error when required == true. Seeing this, I think it's just better to move that check to the caller and handle the None case by either throwing or setting a default.

This also removes some type annotations that aren't required.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	95,574	95,574	0
Passed	75,273	75,273	0
Ignored	19,482	19,482	0
Failed	819	819	0
Panics	0	0	0
Conformance	78.76%	78.76%	0.00%

[codecov]

Codecov Report

Attention: 56 lines in your changes are missing coverage. Please review.

Comparison is base (1dcd0e6) 49.53% compared to head (227d6d5) 49.54%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3355      +/-   ##
==========================================
+ Coverage   49.53%   49.54%   +0.01%     
==========================================
  Files         446      446              
  Lines       43722    43710      -12     
==========================================
- Hits        21659    21658       -1     
+ Misses      22063    22052      -11     

Files	Coverage Δ
boa_engine/src/builtins/intl/locale/utils.rs	50.63% <0.00%> (ø)
boa_engine/src/builtins/options.rs	0.00% <0.00%> (ø)
boa_engine/src/builtins/intl/segmenter/mod.rs	10.52% <0.00%> (+0.21%)	⬆️
boa_engine/src/builtins/intl/list_format/mod.rs	6.74% <0.00%> (+0.08%)	⬆️
...oa_engine/src/builtins/intl/number_format/utils.rs	0.00% <0.00%> (ø)
boa_engine/src/builtins/intl/plural_rules/mod.rs	6.71% <0.00%> (+0.04%)	⬆️
boa_engine/src/builtins/intl/collator/mod.rs	7.24% <0.00%> (+0.10%)	⬆️
boa_engine/src/builtins/intl/locale/mod.rs	23.15% <0.00%> (+0.75%)	⬆️
boa_engine/src/builtins/intl/locale/options.rs	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

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[nekevss]

Looks good to me