Make IntegerIndexed::byte_offset public

[CryZe]

This allows querying the full range of the TypedArray in the underlying ArrayBuffer.

[codecov]

Codecov Report

Merging #3017 (0a8f3cd) into main (45e0b88) will increase coverage by 0.02%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #3017      +/-   ##
==========================================
+ Coverage   50.56%   50.58%   +0.02%     
==========================================
  Files         446      446              
  Lines       45902    45920      +18     
==========================================
+ Hits        23210    23230      +20     
+ Misses      22692    22690       -2     

Impacted Files	Coverage Δ
...src/builtins/typed_array/integer_indexed_object.rs	0.00% <0.00%> (ø)

... and 4 files with indirect coverage changes

[jedel1043]

Thanks! I'm in favour of exposing this as a public accessor, since it's part of the properties that the spec defines for integer indexed objects.

[HalidOdat]

Looks good to me!