Fixed #31377 -- Disabled grouping by aliases on QuerySet.values()/values_list() when they collide with field names.

Regression in fb3f034f1c.

Thanks Holovashchenko Vadym for the report.

tests/aggregation/models.py

@@ -5,6 +5,7 @@ class Author(models.Model):
     name = models.CharField(max_length=100)
     age = models.IntegerField()
     friends = models.ManyToManyField('self', blank=True)
+    rating = models.FloatField(null=True)
 
     def __str__(self):
         return self.name