Consolidate configuration of Sidekiq::Testing.fake! setup (#28046)

spec/controllers/api/v1/statuses/reblogs_controller_spec.rb

@@ -9,13 +9,7 @@ describe Api::V1::Statuses::ReblogsController do
   let(:app)   { Fabricate(:application, name: 'Test app', website: 'http://testapp.com') }
   let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: 'write:statuses', application: app) }
 
-  context 'with an oauth token' do
-    around do |example|
-      Sidekiq::Testing.fake! do
-        example.run
-      end
-    end
-
+  context 'with an oauth token', :sidekiq_fake do
     before do
       allow(controller).to receive(:doorkeeper_token) { token }
     end