Single-file apphost.cs template in aspire new produces apphost.cs that doesn't work with `dotnet run`

Running `aspire new` and selecting the single-file apphost C# option produces an `apphost.cs` that you can't run with `dotnet run apphost.cs` because the `apphost.run.json` file was replaced with `aspire.config.json`. The apphost requires environment variables set by the launch profile and when using `dotnet run apphost.cs` those launch profiles exist in `apphost.run.json`.