Coding - Fix critical CodeQL static analysis warnings (#1074)

Interface_ParamSet:
- Eliminate use-after-free in Append() by deleting old buffer through
  a temp variable after reassigning the member pointer (CodeQL #5132/#2684)

delabella.cpp:
- Fix upcast array pointer arithmetic by parenthesizing cast to ensure
  pointer arithmetic uses derived class (Vert) size rather than base
  class (DelaBella_Vertex) size (CodeQL #5131)

NCollection_SparseArrayBase:
- Rework to replace virtual dispatch (createItem/destroyItem/copyItem)
  with function pointers passed as arguments to protected methods
- Store only DestroyItemFunc in base class to enable safe cleanup
  in destructor without virtual dispatch
- Pass CreateItemFunc and CopyItemFunc as arguments with zero
  per-instance storage overhead
- Move Clear() and UnsetValue() from base public API to protected
  clearItems()/unsetValue() with function pointer parameters;
  template class provides public wrappers
- Remove vtable entirely (no virtual methods remain)
- This eliminates the pure virtual call during base class destruction
  (CodeQL #5012)

AdvApp2Var_MathBase:
- Rewrite comparison to avoid potential signed integer overflow:
  *ncfnew + 1 > ncut becomes *ncfnew >= ncut (CodeQL #2692)

src/ModelingData/TKGeomBase/AdvApp2Var/AdvApp2Var_MathBase.cxx

@@ -535,7 +535,7 @@ int mmaper0_(integer*    ncofmx,
   /* ------ Minimum that can be reached : Stop at 1 or NCFNEW ------ */
 
   ncut = 1;
-  if (*ncfnew + 1 > ncut)
+  if (*ncfnew >= ncut)
   {
     ncut = *ncfnew + 1;
   }