Enables `track_work_items_activity` feature flag by default
What does this MR do and why?
The work_items
feature flag was enabled by default in !92570 (merged). We need to do the same thing for track_work_items_activity
as we want to track users using the feature in production.
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 #352903