Add instrumentation for LDAP integration

What does this MR do and why?

Describe in detail what your merge request does and why.

Adds instrumentation for LDAP requests to both log output and Prometheus metrics. It will only be exposed in the logs if LDAP requests were made during a request. This will aid in debugging whether LDAP is the cause of slowness in requests, as it was previously unobservable.

Related #382388 (closed)

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.