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/lib/topic_creator_spec.rb

@@ -1,9 +1,9 @@
 # frozen_string_literal: true
 
 RSpec.describe TopicCreator do
-  fab!(:user) { Fabricate(:user, trust_level: TrustLevel[2]) }
+  fab!(:user) { Fabricate(:user, trust_level: TrustLevel[2], refresh_auto_groups: true) }
   fab!(:moderator)
-  fab!(:admin)
+  fab!(:admin) { Fabricate(:admin, refresh_auto_groups: true) }
 
   let(:valid_attrs) { Fabricate.attributes_for(:topic) }
   let(:pm_valid_attrs) do
@@ -24,8 +24,6 @@ RSpec.describe TopicCreator do
     }
   end
 
-  before { Group.refresh_automatic_groups! }
-
   describe "#create" do
     context "with topic success cases" do
       before do
@@ -497,7 +495,6 @@ RSpec.describe TopicCreator do
           TopicCreator.any_instance.expects(:watch_topic).returns(true)
           SiteSetting.allow_duplicate_topic_titles = true
           SiteSetting.enable_staged_users = true
-          Group.refresh_automatic_groups!
         end
 
         it "should be possible for a regular user to send private message" do
@@ -546,8 +543,6 @@ RSpec.describe TopicCreator do
       end
 
       context "with to emails" do
-        before { Group.refresh_automatic_groups! }
-
         it "works for staff" do
           SiteSetting.send_email_messages_allowed_groups = "1|3"
           expect(