Inheritance Margin throws `StreamJsonRpc.RemoteInvocationException`, saying the source files are not included in the solution if they are generated by source generators

[KyouyamaKazusa0805]

Version Used:

VS 17.3p6

Steps to Reproduce:

Creates a source generator, and implements a basic logic that can generate a type or other things that will display an inheritance margin icon in the side bar. Then opens the generated file, you will get an error.

Details:

StreamJsonRpc.RemoteInvocationException: The solution does not contain the specified document.
   at StreamJsonRpc.JsonRpc.<InvokeCoreAsync>d__143`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Remote.BrokeredServiceConnection`1.<TryInvokeAsync>d__16`1.MoveNext()
RPC server exception:
System.InvalidOperationException: The solution does not contain the specified document.
      at Microsoft.CodeAnalysis.Shared.Extensions.ISolutionExtensions.GetRequiredDocument(Solution solution, DocumentId documentId)
      at Microsoft.CodeAnalysis.Remote.RemoteInheritanceMarginService.<>c__DisplayClass2_0.<GetInheritanceMarginItemsAsync>b__0(Solution solution)
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<>c__DisplayClass10_0`1.<<RunWithSolutionAsync>g__TryFastGetSolutionAndRunAsync|0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<RunWithSolutionAsync>d__10`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunWithSolutionAsync>d__11`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunServiceImplAsync>d__14`1.MoveNext()

Screenshot:

Expected Behavior:

No errors here.

Actual Behavior:

StreamJsonRpc.RemoteInvocationException is thrown.

[ryzngard]

+1 report https://developercommunity.visualstudio.com/t/Feature-Inheritance-margin-appears-to-/10114469

[Youssef1313]

https://github.com/dotnet/roslyn/blob/de96b01ccc6c51d2ad0501df18475079fbe2c7e1/src/Workspaces/Remote/ServiceHub/Services/InheritanceMargin/RemoteInheritanceMarginService.cs#L38

I think we just need to pass includeSourceGenerated: true in the above line, exactly the same way as https://github.com/dotnet/roslyn/pull/63683