Default enable code suggestions on all namespaces for new Ultimate accounts

What does this MR do and why?

changes code suggestions default to true as per decision in #407766 (closed)

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 #407766 (closed)