Application Settings auditor changes

What does this MR do and why?

Solves #282428 (closed)

Application Settings auditor

Screenshots or screen recordings

Audit Event log in Monitoring>Audit Events section for Application Setting

How to set up and validate locally

1. Update Application Setting from Admin Area > Settings
2. Observe Audit event being logged in Admin Area > Monitoring > Audit Events

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.