[Developer Hub]Need To Be Able to use multiple auth providers for github type of authentication, so that github enterprise and github cloud can be utilized

Issue

When configuring auth providers for github in the app-config.yaml, we need to be able to provide multiple github providers so that github-enterprise and github cloud can be used simultaneously

    auth:
      environment: development
      providers:
        github-cloud:
          development:
            clientId: ${GITHUB_CLOUD_CLIENT_ID}
            clientSecret: ${GITHUB_CLOUD_CLIENT_SECRET}
        github:
          development:
            clientId: ${GITHUB_CLIENT_ID}
            clientSecret: ${GITHUB_CLIENT_SECRET}
            enterpriseInstanceUrl: https://github.company.com