Fix deprecation warning caused by 75fea0bd95

https://buildkite.com/rails/rails/builds/83735#5263c6de-2f1f-474d-8871-8529948c8d96/1053-1061

activerecord/test/cases/adapters/mysql2/mysql2_adapter_test.rb

@@ -33,7 +33,7 @@ class Mysql2AdapterTest < ActiveRecord::Mysql2TestCase
       fake_connection,
       ActiveRecord::Base.logger,
       nil,
-      { socket: File::NULL }
+      { socket: File::NULL, prepared_statements: false }
     )
     assert_raises ActiveRecord::ConnectionNotEstablished do
       @conn.reconnect!