Fix project feature specs with the super sidebar

What does this MR do and why?

Fix project feature specs with the super sidebar

Updates user_sees_collaboration_links_spec and user_sees_sidebar_spec feature specs to pass with the super sidebar enabled.

Screenshots or screen recordings

No visual change.

How to set up and validate locally

bundle exec rspec spec/features/projects/show/user_sees_collaboration_links_spec.rb
bundle exec rspec spec/features/projects/user_sees_sidebar_spec.rb

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 #420121 (closed)