Improving logs from hostfxr

[jkotalik]

Fixes #24358

Example error message:

[aspnetcorev2_inprocess.dll] Event Log: 'Application '/LM/W3SVC/1/ROOT' with physical root 'C:\inetpub\wwwroot\' failed to load coreclr. Exception message:
Error occurred when initializing in-process application, Return code: 0x80008083, Error logs: A fatal error was encountered. The library 'hostpolicy.dll' required to execute the application was not found in 'C:\Program Files\dotnet'.
Failed to run as a self-contained app.
  - The application was run as a self-contained app because 'C:\inetpub\wwwroot\SelfContainedIssueRepro.runtimeconfig.json' did not specify a framework.
  - If this should be a framework-dependent app, specify the appropriate framework in 'C:\inetpub\wwwroot\SelfContainedIssueRepro.runtimeconfig.json'.
A fatal error was encountered. The library 'hostpolicy.dll' required to execute the application was not found in 'C:\Program Files\dotnet'.
Failed to run as a self-contained app.
  - The application was run as a self-contained app because 'C:\inetpub\wwwroot\SelfContainedIssueRepro.runtimeconfig.json' did not specify a framework.
  - If this should be a framework-dependent app, specify the appropriate framework in 'C:\inetpub\wwwroot\SelfContainedIssueRepro.runtimeconfig.json'.
' 
End Event Log 

[BrennanConroy]

move the comment

[jkotalik]

Moving the StandardStreamRedirection up should be fine, it's now just called slightly earlier. No other methods modify the redirection.

ForwardingRedirectionOutput should also be fine, it still will be closed before StandardStreamRedirection.

[jkotalik]

@Pilchie can you merge this for rc2?

[Pilchie]

Approved for .NET 5 RC2