Disallow changing type of already created objects

[jedel1043]

This allows us to cleanup some of our Js method wrappers for built-ins, like JsPromise which I've already cleaned up in this PR.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	95,609	95,609	0
Passed	75,690	75,690	0
Ignored	19,160	19,160	0
Failed	759	759	0
Panics	0	0	0
Conformance	79.17%	79.17%	0.00%

[codecov]

Codecov Report

Attention: 106 lines in your changes are missing coverage. Please review.

Comparison is base (cec9892) 45.64% compared to head (3c35737) 45.63%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3410      +/-   ##
==========================================
- Coverage   45.64%   45.63%   -0.01%     
==========================================
  Files         483      483              
  Lines       49517    49466      -51     
==========================================
- Hits        22600    22572      -28     
+ Misses      26917    26894      -23     

Files	Coverage Δ
boa_ast/src/expression/regexp.rs	76.47% <ø> (ø)
boa_engine/src/context/intrinsics.rs	97.61% <100.00%> (+0.05%)	⬆️
boa_engine/src/context/mod.rs	51.97% <ø> (ø)
boa_engine/src/module/synthetic.rs	0.00% <ø> (ø)
boa_engine/src/object/builtins/jsfunction.rs	57.14% <ø> (ø)
boa_engine/src/object/builtins/jsregexp.rs	7.14% <100.00%> (-8.45%)	⬇️
boa_engine/src/object/internal_methods/function.rs	91.17% <100.00%> (+0.56%)	⬆️
boa_engine/src/object/operations.rs	52.36% <100.00%> (ø)
boa_engine/src/native_function.rs	62.96% <0.00%> (-5.04%)	⬇️
boa_examples/src/bin/synthetic.rs	0.00% <0.00%> (ø)
... and 9 more

... and 5 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[HalidOdat]

Looks good to me! :)