Update e2e tests for vue_issues_list ff

What does this MR do and why?

Updates e2e tests to work with the vue_issues_list feature flag.

See #323743 (comment 741735358)

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.