Shrink environment binding locators

[HalidOdat]

Shrinks environments binding locators (which we were already doing when we truncate it to environment bytecode operands).

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	93,982	93,982	0
Passed	73,783	73,783	0
Ignored	17,489	17,489	0
Failed	2,710	2,710	0
Panics	0	0	0
Conformance	78.51%	78.51%	0.00%

[codecov]

Codecov Report

Merging #2950 (3db3da5) into main (fdf9444) will increase coverage by 0.00%.
The diff coverage is 80.68%.

@@           Coverage Diff           @@
##             main    #2950   +/-   ##
=======================================
  Coverage   50.39%   50.39%           
=======================================
  Files         444      444           
  Lines       45349    45350    +1     
=======================================
+ Hits        22854    22855    +1     
  Misses      22495    22495           

Impacted Files	Coverage Δ
boa_engine/src/bytecompiler/mod.rs	65.78% <ø> (ø)
...ine/src/environments/runtime/declarative/module.rs	0.00% <0.00%> (ø)
boa_engine/src/vm/code_block.rs	55.80% <ø> (ø)
...oa_engine/src/object/internal_methods/arguments.rs	5.63% <16.66%> (ø)
boa_engine/src/bytecompiler/class.rs	15.80% <50.00%> (ø)
boa_engine/src/builtins/function/arguments.rs	96.66% <71.42%> (+0.05%)	⬆️
boa_engine/src/environments/runtime/mod.rs	76.30% <92.30%> (-0.09%)	⬇️
boa_engine/src/builtins/eval/mod.rs	64.58% <100.00%> (ø)
boa_engine/src/bytecompiler/env.rs	93.33% <100.00%> (ø)
boa_engine/src/bytecompiler/function.rs	90.90% <100.00%> (ø)
... and 11 more