Oryx fails to spot compatible dotnet runtime versions even when installed.

[Mathiyarasy]

Bug Report

• At what date and time did you most recently experience the problem?

• Where did you experience the problem? E.g. Azure Web Apps, Azure Functions, Azure Container Registry, or offline use.

  In building Devcontainer Features and Images

• If your repo is publicly available please share its URL:
  https://github.com/devcontainers/features/blob/2951f0481a488ea43a6f2ea6f18a47f0a0bf744d/src/oryx/install.sh#L195

• What happened?
  In Dev containers we are using Oryx as a feature to be installed in images.
  For image: ubuntu:focal installed Dotnet SDK: 8.0.101 and runtime version is 8.0.1
  Then when we build and publish project from oryx repo: BuildScriptGeneratorCli.csproj
  could not run the Published dll GenerateBuildScript.dll . Landing in runtime issue stating
  "You must install or update .net to run the application. Frameworks are not found"
  Despite having .net sdks and runtimes installed. Dotnet is installed using install.sh script
  using 8.0.101 dotnet sdk as mentioned in document: https://github.com/microsoft/Oryx/blob/main/doc/supportedPlatformVersions.md#focal-scm

  Options Checked:
  .
  dotnet --list-sdks :

      Gathering SDK locations in [/usr/share/dotnet]
      Found SDK version [7.0.410]
      Found SDK version [8.0.101]
      7.0.410 [/usr/share/dotnet/sdk]
      8.0.101 [/usr/share/dotnet/sdk]
  

  dotnet --list-runtimes:

    Microsoft.AspNetCore.App 7.0.20 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
    Microsoft.AspNetCore.App 8.0.1 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
    Microsoft.NETCore.App 7.0.20 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
    Microsoft.NETCore.App 8.0.1 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
  
  DOTNET_ROOT environment variable is set correctly
  PATH also have reference to installed dotnet location
  

  Tried higher versions of sdk ex:8.0.202 landed in same issue

  Could you please help us in figuring out the compatible version of .net sdk for GenerateBuildScript.dll?

• What did you expect or want to happen?
  Published GenerateBuildScript without any issues .

• How can we reproduce it?
  Build and Publish the project when installed .net SDK is 8.0.101.

• Do you have log output? Please include between the backticks:

You must install or update .NET to run this application.

App: /usr/local/buildscriptgen/GenerateBuildScript
Architecture: x64
Framework: 'Microsoft.NETCore.App', version '8.0' (x64)
.NET location: /usr/local/buildscriptgen/

No frameworks were found.

Learn more:
https://aka.ms/dotnet/app-launch-failed

To install missing framework, download:
https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=8.0&arch=x64&rid=linux-x64&os=ubuntu.20.04

[Mathiyarasy]

It is working when publishing the dotnet project with runtime. using --self-contained true tag