Add info tooltip to sec primary config

What does this MR do and why?

Adds a info-icon with a tooltip to the security-training configuration page to describe what a primary provider does:

Screenshots or screen recordings

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.

Related to #346060 (closed)