DEV: Convert min_trust_to_flag_posts setting to groups (#24864)

We're changing the implementation of trust levels to use groups. Part of this is to have site settings that reference trust levels use groups instead. It converts the min_trust_to_flag_posts site setting to flag_post_allowed_groups.

Note: In the original setting, "posts" is plural. I have changed this to "post" singular in the new setting to match others.

spec/jobs/auto_queue_handler_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe Jobs::AutoQueueHandler do
   describe "old flagged post" do
     fab!(:spam_result) do
       PostActionCreator.new(
-        Fabricate(:user),
+        Fabricate(:user, refresh_auto_groups: true),
         Fabricate(:post),
         PostActionType.types[:spam],
         message: "this is the initial message",

spec/jobs/export_user_archive_spec.rb

@@ -3,7 +3,7 @@
 require "csv"
 
 RSpec.describe Jobs::ExportUserArchive do
-  fab!(:user) { Fabricate(:user, username: "john_doe") }
+  fab!(:user) { Fabricate(:user, username: "john_doe", refresh_auto_groups: true) }
   fab!(:user2) { Fabricate(:user) }
   let(:extra) { {} }
   let(:job) do

spec/jobs/pending_reviewables_reminder_spec.rb

@@ -5,7 +5,7 @@ RSpec.describe Jobs::PendingReviewablesReminder do
 
   def create_flag(created_at)
     PostActionCreator.create(
-      Fabricate(:user),
+      Fabricate(:user, refresh_auto_groups: true),
       Fabricate(:post),
       :spam,
       created_at: created_at,

spec/jobs/truncate_user_flag_stats_spec.rb

@@ -1,8 +1,8 @@
 # frozen_string_literal: true
 
 RSpec.describe Jobs::TruncateUserFlagStats do
-  fab!(:user)
-  fab!(:other_user) { Fabricate(:user) }
+  fab!(:user) { Fabricate(:user, refresh_auto_groups: true) }
+  fab!(:other_user) { Fabricate(:user, refresh_auto_groups: true) }
 
   before do
     # We might make this a site setting eventually