[browser][MT] Blazor E2E test with MT runtime

[pavelsavara]

Build the test app with experimental MT workload

To unit test that

• the app could start (with cop headers)

Later scenarios are (we are not ready yet)

• the HTTP client is still working [browser][MT] Make HTTP and WS clients work runtime#87567
• The JS interop could be dispatched to main thread via InvokeAsync [blazor][wasm] Dispatch rendering to main thread #48991

cc @javiercn

[ghost]

Thanks for contacting us.

We're moving this issue to the .NET 9 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[ghost]

Thanks for contacting us.

We're moving this issue to the .NET 9 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[mkArtakMSFT]

Closing this as a dupe of #53435 as we're including it into .NET 9 plans.