Can no longer run standalone Blazor WebAssembly apps from source in this repo

[SteveSandersonMS]

Repro:

• cd src\Components\WebAssembly\testassets\StandaloneApp
• dotnet run

Expected: App runs, as it used to
Actual:

A fatal error was encountered. The library 'hostpolicy.dll' required to execute the application was not found in 'C:\path\artifacts\bin\Microsoft.AspNetCore.Components.WebAssembly.DevServer\Debug\net6.0\'.
Failed to run as a self-contained app.
  - The application was run as a self-contained app because 'C:\path\artifacts\bin\Microsoft.AspNetCore.Components.WebAssembly.DevServer\Debug\net6.0\blazor-devserver.runtimeconfig.json' was not found.
  - If this should be a framework-dependent app, add the 'C:\path\artifacts\bin\Microsoft.AspNetCore.Components.WebAssembly.DevServer\Debug\net6.0\blazor-devserver.runtimeconfig.json' file and specify the appropriate framework.

In combination with #31023 which TBH is much more impactful, I'm finding the productivity of working within our repo to be a real challenge at the moment. Am I the only one? If anyone has capacity to look into this before the end of preview 4 that would be great, or if not I think we need to reserve some time at the start of preview 5 to prioritise this ahead of feature/bug work.

[ghost]

Thanks for contacting us.
We're moving this issue to the Next sprint planning milestone for future evaluation / consideration. Because it's not immediately obvious that this is a bug in our framework, we would like to keep this around to collect more feedback, which can later help us determine the impact of it. 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.

[pranavkm]

@captainsafia if you're able to look at this as part of build ops, that would be great.

[captainsafia]

Should be fixed on the latest main.