Add ServerSideSort control integration tests

[jsumners]

Using the apacheds image, https://github.com/ldapjs/docker-test-apacheds/pkgs/container/docker-test-apacheds/apacheds, we should add proper integration tests for the ServerSideSort control. These tests will verify that we are sending the sort control request correctly, and verify that we are parsing the returned sort control response correctly.

See https://github.com/ldapjs/docker-test-apacheds/tree/b5b4c6b3807674fa3490b37946bdb388e0cdc073#testing-the-vlv-control for an example.

[jsumners]

👋

On February 22, 2023, we released version 3 of this library. As a result, we are closing this issue/pull request.

Please see issue #839 for more information, including how to proceed if you feel this closure is in error.