DEV: Remove full group refreshes from tests (#25414)

We have all these calls to Group.refresh_automatic_groups! littered throughout the tests. Including tests that are seemingly unrelated to groups. This is because automatic group memberships aren't fabricated when making a vanilla user. There are two places where you'd want to use this:

You have fabricated a user that needs a certain trust level (which is now based on group membership.)
You need the system user to have a certain trust level.
In the first case, we can pass refresh_auto_groups: true to the fabricator instead. This is a more lightweight operation that only considers a single user, instead of all users in all groups.

The second case is no longer a thing after #25400.

spec/support/helpers.rb

@@ -40,10 +40,7 @@ module Helpers
   def create_topic(args = {})
     args[:title] ||= "This is my title #{Helpers.next_seq}"
     user = args.delete(:user)
-    if !user
-      user = Fabricate(:user)
-      Group.refresh_automatic_groups!
-    end
+    user = Fabricate(:user, refresh_auto_groups: true) if !user
     guardian = Guardian.new(user)
     args[:category] = args[:category].id if args[:category].is_a?(Category)
     TopicCreator.create(user, guardian, args)
@@ -57,9 +54,7 @@ module Helpers
     args[:title] ||= "This is my title #{Helpers.next_seq}"
     args[:raw] ||= "This is the raw body of my post, it is cool #{Helpers.next_seq}"
     args[:topic_id] = args[:topic].id if args[:topic]
-    automated_group_refresh_required = args[:user].blank?
-    user = args.delete(:user) || Fabricate(:user)
-    Group.refresh_automatic_groups! if automated_group_refresh_required
+    user = args.delete(:user) || Fabricate(:user, refresh_auto_groups: true)
     args[:category] = args[:category].id if args[:category].is_a?(Category)
     creator = PostCreator.new(user, args)
     post = creator.create