[clang] Reland "[OpenMP][TR12] change property of map-type modifier." (PR #90935)

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

Yes, its there
but it's too late

we can't cast to enum invalid values 
it should be like:
```
  unsigned MapType = getOpenMPSimpleClauseType(
          OMPC_map, PP.getSpelling(Tok), P.getLangOpts());
  if (MapType == OMPC_MAP_to || MapType == OMPC_MAP_from ||
      MapType == OMPC_MAP_tofrom || MapType == OMPC_MAP_alloc ||
      MapType == OMPC_MAP_delete || MapType == OMPC_MAP_release)
    return static_cast<>(MapType);
  return OMPC_MAP_unkno
```


https://github.com/llvm/llvm-project/pull/90935