Temporal duration update and cleanup

[nekevss]

Some more work on temporal, in a little bit of a smaller PR 😉

Mostly just trying to do a bit of cleanup and small cleanups/refactors with the idea of beginning to migrate some of the temporal methods and structures into their own crates.

It changes the following:

• Updates and/or begins to update a couple of Temporal.Duration's methods and abstracts to relatively recent changes to the specification.
• General nitpicky cleanups to begin isolating some Temporal APIs from Boa specifics (calendar impl's needing context)

Aside: are smaller PRs a bit more similar to this one going to be easier to manage even if they are relatively more unfinished? I'm trying to avoid the monstrosity that was the last PR.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	95,609	95,609	0
Passed	76,518	76,518	0
Ignored	18,132	18,132	0
Failed	959	959	0
Panics	0	0	0
Conformance	80.03%	80.03%	0.00%

[codecov]

Codecov Report

Attention: 444 lines in your changes are missing coverage. Please review.

Comparison is base (04ed7be) 44.82% compared to head (81bda2e) 44.81%.
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3443      +/-   ##
==========================================
- Coverage   44.82%   44.81%   -0.02%     
==========================================
  Files         488      488              
  Lines       50497    50373     -124     
==========================================
- Hits        22637    22576      -61     
+ Misses      27860    27797      -63     

Files	Coverage Δ
boa_engine/src/builtins/temporal/mod.rs	26.78% <ø> (ø)
boa_engine/src/builtins/temporal/instant/mod.rs	12.14% <0.00%> (-0.08%)	⬇️
boa_engine/src/builtins/temporal/fields.rs	0.00% <0.00%> (ø)
boa_engine/src/builtins/temporal/plain_date/iso.rs	8.23% <0.00%> (+0.09%)	⬆️
boa_engine/src/builtins/temporal/duration/mod.rs	39.09% <0.00%> (+5.10%)	⬆️
boa_engine/src/builtins/temporal/plain_date/mod.rs	36.18% <0.00%> (-3.82%)	⬇️
boa_engine/src/builtins/temporal/calendar/iso.rs	10.40% <18.60%> (+0.91%)	⬆️
boa_engine/src/builtins/temporal/calendar/mod.rs	10.52% <7.14%> (-0.07%)	⬇️
...oa_engine/src/builtins/temporal/duration/record.rs	8.92% <0.00%> (+0.13%)	⬆️

... and 19 files with indirect coverage changes

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[jedel1043]

Smaller PRs sound like the best way to work incrementally on temporal, so +1 to that.

[nekevss]

I'll try to do more frequent smaller updates then.

[HalidOdat]

Looks good! Just some minor nitpick! :)

[jedel1043]

Nice work!