Cache does not pass context when fetching a field from only one record

When auto fetching a record field, context is not passed if this is only one record


in cache.py
```python
 if len(res_ids) == 1:
            return self[res_ids[0]][field].get()
        else:
            recordset = self.api.with_context(**context).browse(res_ids)
            return recordset.mapped(field)
```