[browser][coreCLR] temporarily disabled tests

[pavelsavara]

This is quick and dirty disabling part of the System.Runtime.Tests to get us started with testing new platform. I didn't try to fix any of them for now.

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[lewing]

 [ActiveIssue("https://github.com/dotnet/runtime/issues/123011", typeof(PlatformDetection), nameof(PlatformDetection.IsBrowser), nameof(PlatformDetection.IsCoreCLR)]

Or IsCoreCLRInterpreter