[browser] partial reversal of PR #82826

[pavelsavara]

There is problem in Blazor E2E test with protecting the class System.Runtime.InteropServices.JavaScript.LegacyExports from trimming.

It seems in some scenario the root file ILLink.Descriptors.LegacyJsInterop.xml is not available and the class is trimmed even if we still should have it.

I believe that this PR would be enough revert of the original #82826
We should use it in case that we can't figure out better fix.

[ghost]

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Issue Details

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There is problem in Blazor E2E test with protecting the class System.Runtime.InteropServices.JavaScript.LegacyExports from trimming.

It seems in some scenario the root file ILLink.Descriptors.LegacyJsInterop.xml is not available and the class is trimmed even if we still should have it.

I believe that this PR would be enough revert of the original #82826
We should use it in case that we can't figure out better fix.

Author:	pavelsavara
Assignees:	pavelsavara
Labels:	arch-wasm, area-System.Runtime.InteropServices.JavaScript
Milestone:	8.0.0

[wtgodbe]

@maraf any idea why this is failing?

If we understand the failures and can fix them, I think we should port this to the preview3 branch instead of #83664 in order to unblock runtime -> aspnetcore codeflow (CC @mmitche)

Related: dotnet/aspnetcore#47110

[maraf]

Failures are not related.
I'll test it once again locally if it's enough change for blazor to work.

[maraf]

/backport to release/8.0-preview3

[github-actions]

Started backporting to release/8.0-preview3: https://github.com/dotnet/runtime/actions/runs/4483993832