Type exposed using `InternalsVisibleTo` is not available when using `5.0.100-preview.6.20314.3` SDK

PowerShell has a dependency on Microsoft.Management.Infrastructure.dll which has an internal type CimMofDeserializer. It has System.Management.Automation in the list of InternalsVisibleTo.

When trying to build System.Management.Automation we see the following errors:

D:\PSGit\PowerShell\src\System.Management.Automation\DscSupport\CimDSCParser.cs(323,17): error CS0122: 'CimMofDeserializer' is inaccessible due to its protection level [D:\PSGit\PowerShell\src\System.Management.Automation\System.Management.Automation.csproj]
D:\PSGit\PowerShell\src\System.Management.Automation\DscSupport\CimDSCParser.cs(324,17): error CS0122: 'CimMofDeserializer' is inaccessible due to its protection level [D:\PSGit\PowerShell\src\System.Management.Automation\System.Management.Automation.csproj]
D:\PSGit\PowerShell\src\System.Management.Automation\DscSupport\CimDSCParser.cs(327,31): error CS0122: 'CimMofDeserializer' is inaccessible due to its protection level [D:\PSGit\PowerShell\src\System.Management.Automation\System.Management.Automation.csproj]
D:\PSGit\PowerShell\src\System.Management.Automation\DscSupport\CimDSCParser.cs(335,31): error CS0122: 'CimMofDeserializer' is inaccessible due to its protection level [D:\PSGit\PowerShell\src\System.Management.Automation\System.Management.Automation.csproj]
D:\PSGit\PowerShell\src\System.Management.Automation\DscSupport\CimDSCParser.cs(335,129): error CS0122: 'MofDeserializerSchemaValidationOption' is inaccessible due to its protection level [D:\PSGit\PowerShell\src\System.Management.Automation\System.Management.Automation.csproj]

This only happens when we upgrade the SDK version from 5.0.100-preview.5.20279.10 to 5.0.100-preview.6.20314.3

Repro steps:

1. Clone repository https://github.com/PowerShell/PowerShell.git
2. Update the global.json file to have 5.0.100-preview.6.20314.3
3. In PowerShell (on Windows), Import-Module build.psm1
4. Start-PSBootstrap to install the Preview 6 SDK
5. Start-PSBuild -Clean

[jkoritzinsky]

When we move the target we need to be careful that we still fail on rebuilds (that the incremental build output doesn’t cause us to skip the error or appear successful).

[marcpopMSFT]

Jeremy’s changed resolved this.