[browser] Read `AssetTraitValue` to get culture for resource during webcil transforma...

[browser] Read `AssetTraitValue` to get culture for resource during webcil transformation (#89600)

* Read AssetTraitValue when determining culture for resource during webcil transformation
* Add WBT with Blazor with resources in two cultures and build+publish
* Check for emcc-link.rsp instead of that for-build directory exists
* track api changes in main
* Avoid using unicode character in an unrelated test name. it breaks emcc build on windows

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Co-authored-by: Ankit Jain <radical@gmail.com>