Update sort name from Last updated to Updated date

What does this MR do and why?

This MR updates the sort name on list views from Last updated to Updated date, as decided by UX in #23775 (closed)

Screenshots or screen recordings

before	after

How to set up and validate locally

Test the list pages such as issues, merge requests, and requirements

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 #23775 (closed)