Pull out https/hostname setup for request specs to shared config (#31622)

spec/requests/media_proxy_spec.rb

@@ -4,12 +4,7 @@ require 'rails_helper'
 
 describe 'Media Proxy' do
   describe 'GET /media_proxy/:id' do
-    before do
-      integration_session.https! # TODO: Move to global rails_helper for all request specs?
-      host! Rails.configuration.x.local_domain # TODO: Move to global rails_helper for all request specs?
-
-      stub_request(:get, 'http://example.com/attachment.png').to_return(request_fixture('avatar.txt'))
-    end
+    before { stub_attachment_request }
 
     context 'when attached to a status' do
       let(:status) { Fabricate(:status) }
@@ -63,5 +58,15 @@ describe 'Media Proxy' do
           .to have_http_status(404)
       end
     end
+
+    def stub_attachment_request
+      stub_request(
+        :get,
+        'http://example.com/attachment.png'
+      )
+        .to_return(
+          request_fixture('avatar.txt')
+        )
+    end
   end
 end