Revert "Do not pull all enums. Use the lookup facility."

This reverts commit 2b071027.

Try to appease the incremental builds. They fail with:

In file included from test_Persistency1_C_ACLiC_dict dictionary payload:7:
./test_Persistency1.C:69:8: error: redefinition of 'Event'
struct Event : public DataObject  {
       ^
/.../roottest/root/tree/cache/Event.h:103:7: note: previous definition is here
class Event : public TObject {
      ^
In file included from test_Persistency1_C_ACLiC_dict dictionary payload:7:
./test_Persistency1.C:86:8: error: no member named 'm_evt' in 'Event'
    d->m_evt = d->m_run = i;

core/meta/src/TEnum.cxx

@@ -167,7 +167,7 @@ TEnum *TEnum::GetEnum(const char *enumName, ESearchAction sa)
       if (sa_local == (kALoadAndInterpLookup)) {
          auto scope = TClass::GetClass(scopeName, true);
          TEnum *en = nullptr;
-         if (scope) en = findEnumInList(scope->GetListOfEnums(kFALSE), enName, sa_local);
+         if (scope) en = findEnumInList(scope->GetListOfEnums(), enName, sa_local);
          return en;
       }