Draft: Upgrade OpenLDAP version

What does this merge request do and why?

• Was using OpenLDAP locally and realized that the version we were using was a few years old
• https://www.openldap.org/software/download/OpenLDAP/openldap-release/

How to set up and validate locally

https://gitlab.com/gitlab-org/gitlab-development-kit/-/blob/main/doc/howto/ldap.md

Impacted categories

The following categories relate to this merge request:

• gdk-reliability - e.g. When a GDK action fails to complete.
• gdk-usability - e.g. Improvements or suggestions around how the GDK functions.
• gdk-performance - e.g. When a GDK action is slow or times out.

Merge request checklist

• This change is backward compatible. If not, please include steps to communicate to our users.
• Tests added for new functionality. If not, please raise an issue to follow-up.
• Documentation added/updated, if needed.
• Announcement added, if change is notable.
• gdk doctor test added, if needed.
• Add the ~highlight label if this MR should be included in the CHANGELOG.md.