Replace deprecated `Sidekiq::Testing` block style (#29097)

spec/rails_helper.rb

@@ -95,8 +95,13 @@ RSpec.configure do |config|
     self.use_transactional_tests = true
   end
 
-  config.around(:each, :sidekiq_inline) do |example|
-    Sidekiq::Testing.inline!(&example)
+  config.around do |example|
+    if example.metadata[:sidekiq_inline] == true
+      Sidekiq::Testing.inline!
+    else
+      Sidekiq::Testing.fake!
+    end
+    example.run
   end
 
   config.before :each, type: :cli do