Enable new navigation per default for logged-in users

What does this MR do and why?

Enable new navigation per default for logged-in users

Previously logged-in users needed to opt-in to the new navigation. Now we are making it the default and we enable them to opt-out.

Changelog: changed

Screenshots or screen recordings

N/A

How to set up and validate locally

N/A

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 #410121 (closed)