Highlight changed fields in framework update audit log

What does this MR do and why?

Highlight changed fields in framework update audit log

• Enhance visibility of changed field and from and to values to make it easier to tell text of audit message and actual changes apart.

References

Please include cross links to any resources that are relevant to this MR. This will give reviewers and future readers helpful context to give an efficient review of the changes introduced.

• Refs: Follow up: Framework update should highlight na... (#505488 - closed) • SAM FIGUEROA • 17.7

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

How to set up and validate locally

1. Go to compliance center ( e.g. http://127.0.0.1:3000/groups/flightjs/-/security/compliance_dashboard/frameworks )
2. Update a framework
3. Go to Audit Events (e.g. http://127.0.0.1:3000/groups/flightjs/-/audit_events )
4. Observe changed audit message