Fixed #27021 -- Allowed lookup expressions in annotations, aggregations, and QuerySet.filter().

Thanks Hannes Ljungberg and Simon Charette for reviews.

Co-authored-by: Mariusz Felisiak <felisiak.mariusz@gmail.com>

django/db/models/fields/related_lookups.py

@@ -22,6 +22,9 @@ class MultiColSource:
     def get_lookup(self, lookup):
         return self.output_field.get_lookup(lookup)
 
+    def resolve_expression(self, *args, **kwargs):
+        return self
+
 
 def get_normalized_value(value, lhs):
     from django.db.models import Model