[browser][coreCLR] ICU sharding not working under CoreCLR WASM runtime

[pavelsavara]

When running Blazor WebAssembly E2E tests with UseMonoRuntime=false (CoreCLR WASM), the ICU sharding feature does not work correctly. The Blazor WASM runtime throws:

InvalidOperationException: Blazor detected a change in the application's culture that is not supported with the current project configuration.
To change culture dynamically during startup, set <BlazorWebAssemblyLoadAllGlobalizationData>true</BlazorWebAssemblyLoadAllGlobalizationData> in the application's project file.

Affected tests (all in WebAssemblyICUShardingTest):

• LoadingApp_FrenchLanguage_Works
• LoadingApp_KoreanLanguage_Works (4 parameter combinations)
• LoadingApp_KannadaLanguage_Works
• LoadingApp_RussianLanguage_Works

Discovered in aspnetcore PR dotnet/aspnetcore#66331

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[dotnet-policy-service]

Tagging subscribers to 'arch-wasm': @lewing, @pavelsavara
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[pavelsavara]

Tentative plan https://gist.github.com/pavelsavara/da42204a8bc7e59eefa338a98304ccf7

[maraf]

This should be resolved by #128296.