meta: After autoload, immediately check TClassTable.

If a library was loaded, the alias for a class were also loaded and a non normalized name might lead to a match.
If we skip this check, then the next step will normalized the name and check for typedef inside the name (if
it is a template instance name) and if the name are not found as is, it may lead to loading the header file.

ie. this fixes #17992 and cms-sw/cmssw#47470

Author: pcanal

core/meta/src/TClass.cxx

@@ -3170,6 +3170,10 @@ TClass *TClass::GetClass(const char *name, Bool_t load, Bool_t silent, size_t hi
       loadedcl = LoadClassDefault(normalizedName.c_str(),silent);
    } else {
       if (gInterpreter->AutoLoad(normalizedName.c_str(),kTRUE)) {
+          // Check if we just loaded the necessary dictionary.
+          loadedcl = LoadClassDefault(normalizedName.c_str(), silent);
+          if (loadedcl)
+             return loadedcl;
          // At this point more information has been loaded.  This
          // information might be pertinent to the normalization of the name.
          // For example it might contain or be a typedef for which we don't