Mark `JsNativeError`'s constructors const

[CrazyboyQCD]

Use constant to reduce binary size. https://godbolt.org/z/YEq4hW49n

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 48.57143% with 18 lines in your changes missing coverage. Please review.

Project coverage is 52.85%. Comparing base (6ddc2b4) to head (23c6c1a). Report is 282 commits behind head on main.

Files with missing lines	Patch %	Lines
core/engine/src/error.rs	54.83%	14 Missing :warning:
core/engine/src/builtins/temporal/error.rs	0.00%	4 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4020      +/-   ##
==========================================
+ Coverage   47.24%   52.85%   +5.60%     
==========================================
  Files         476      482       +6     
  Lines       46892    46723     -169     
==========================================
+ Hits        22154    24695    +2541     
+ Misses      24738    22028    -2710     

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[jedel1043]

@jasonwilliams you pinged a random user 😅