Fixed #35677 -- Avoided non-sticky filtering of prefetched many-to-many.

The original queryset._next_is_sticky() call never had the intended effect as
no further filtering was applied internally after the pk__in lookup making it
a noop.

In order to be coherent with how related filters are applied when retrieving
objects from a related manager the effects of what calling _next_is_sticky()
prior to applying annotations and filters to the queryset provided for
prefetching are emulated by allowing the reuse of all pre-existing JOINs.

Thanks David Glenck and Thiago Bellini Ribeiro for the detailed reports and
tests.

tests/prefetch_related/models.py

@@ -35,6 +35,7 @@ class FavoriteAuthors(models.Model):
     likes_author = models.ForeignKey(
         Author, models.CASCADE, to_field="name", related_name="likes_me"
     )
+    is_active = models.BooleanField(default=True)
 
     class Meta:
         ordering = ["id"]