Change progression providers to use capabilities instead of IntelliSense type....

Change progression providers to use capabilities instead of IntelliSense type. This enables them to work on both .Net core projects and legacy projects.

src/VisualStudio/CSharp/Impl/Progression/CSharpGraphProvider.cs

@@ -12,7 +12,7 @@
 
 namespace Microsoft.VisualStudio.LanguageServices.CSharp.Progression
 {
-    [GraphProvider(Name = "CSharpRoslynProvider", IntellisenseType = Guids.CSharpProjectRootIdString)]
+    [GraphProvider(Name = "CSharpRoslynProvider", ProjectCapability = "CSharp")]
     internal sealed class CSharpGraphProvider : AbstractGraphProvider
     {
         [ImportingConstructor]

src/VisualStudio/VisualBasic/Impl/Progression/VisualBasicGraphProvider.vb

@@ -11,7 +11,7 @@ Imports Microsoft.VisualStudio.Shell
 
 Namespace Microsoft.VisualStudio.LanguageServices.VisualBasic.Progression
 
-    <GraphProvider(Name:="VisualBasicRoslynProvider", IntellisenseType:=Guids.VbCompilerProjectIdString)>
+    <GraphProvider(Name:="VisualBasicRoslynProvider", ProjectCapability:="VisualBasic")>
     Friend NotInheritable Class VisualBasicGraphProvider
         Inherits AbstractGraphProvider