Ensuring redundant group update audit events are not created

What does this MR do and why?

Adding test cases for ensuring that audit events does not get created for group changes when there is no change in value. There is already a check in code for checking if the old value of the column is same as the new one then don't create audit event.

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 #370337 (closed)