`BaseConnectionHandler.close_all()` doesn't work with async clients

[amirreza]

hi
in django.core.cache there is this code:

caches = CacheHandler()


def close_caches(**kwargs):
    # Some caches need to do a cleanup at the end of a request cycle. If not
    # implemented in a particular backend cache.close() is a no-op.
    caches.close_all()

where CacheHandler is a subclass of BaseConnectionHandler
close_all() looks like this:

    def close_all(self):
        for conn in self.all(initialized_only=True):
            conn.close()

but when a async client is at work, .close() doesn't work, it needs to be await conn.aclose()

note that in my case (django-valkey) there is no way for async clients to implement a sync method for close

p.s: i know django doesn't fully support async cache clients, i open this issue so the problem doesn't get lost