CppTools: Move RawProjectPart to ProjectExplorer

Doesn't have any dependencies into CppTools anymore, therefore moving it
reduces the dependencies of the project managers to CppTools as well.

Change-Id: Ibe728abe59eb88a8877943dca1f48a85163e27ac
Reviewed-by: hjk <hjk@qt.io>

src/plugins/genericprojectmanager/genericproject.cpp

@@ -504,7 +504,7 @@ void GenericProject::refreshCppCodeModel()
     QtSupport::CppKitInfo kitInfo(this);
     QTC_ASSERT(kitInfo.isValid(), return);
 
-    CppTools::RawProjectPart rpp;
+    RawProjectPart rpp;
     rpp.setDisplayName(displayName());
     rpp.setProjectFileLocation(projectFilePath().toString());
     rpp.setQtVersion(kitInfo.projectPartQtVersion);