E2E spec updates for super sidebar user flow

What does this MR do and why?

Update UI test flow to support super-sidebar:

• Update user profile flow
• Remove old main menu interaction when using super-sidebar
• Add new menu selector
• Add selectors to main navigation menu items
• Do not run super_sidebar specs automatically to not pollute test report with failures

How to set up and validate locally

• Enable feature flag super_sidebar_nav for your local instance
• Run specs:

QA_SUPER_SIDEBAR_ENABLED=true bundle exec rspec $spec

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.