STYLE: Add itkVirtualGetNameOfClassMacro + itkOverrideGetNameOfClassMacro

Added two new macro's, intended to replace the old 'itkTypeMacro' and
'itkTypeMacroNoParent'.

The main aim is to be clearer about what those macro's do: add a virtual
'GetNameOfClass()' member function and override it. Unlike 'itkTypeMacro',
'itkOverrideGetNameOfClassMacro' does not have a 'superclass' parameter, as it
was not used anyway.

Note that originally 'itkTypeMacro' did not use its 'superclass' parameter
either, looking at commit 699b66cb04d410e555656828e8892107add38ccb, Will
Schroeder, June 27, 2001:
https://github.com/InsightSoftwareConsortium/ITK/blob/699b66cb04d410e555656828e8892107add38ccb/Code/Common/itkMacro.h#L331-L337

Author: hjmjohnson

include/itkHighPriorityRealTimeClock.h

@@ -46,7 +46,7 @@ class PerformanceBenchmarking_EXPORT HighPriorityRealTimeClock : public RealTime
   using ConstPointer = SmartPointer<const Self>;
 
   /** Method for defining the name of the class */
-  itkTypeMacro(HighPriorityRealTimeClock, RealTimeClock);
+  itkOverrideGetNameOfClassMacro(HighPriorityRealTimeClock);
 
   /** Method for creation through the object factory */
   itkNewMacro(Self);

src/PerformanceBenchmarkingInformation.h.in

@@ -82,7 +82,7 @@ public:
   using MapType = std::map<MapKeyType, MapStorageType >;
 
   /** Run-time type information (and related methods). */
-  itkTypeMacro(PerformanceBenchmarkingInformation, Object);
+  itkOverrideGetNameOfClassMacro(PerformanceBenchmarkingInformation);
 
   /** Returns the global instance */
   static Pointer New();