Remove feature flag set_traversal_ids_on_save

What does this MR do and why?

The FF was globally enabled. Removing the FF with this MR.

This code will set the traversal_ids on the object during save as opposed to leaving it blank before.

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 #383217 (closed)