TRea - Phase out qa-selectors

What does this MR do and why?

Picking up some items from this list gitlab-org/quality/quality-engineering/team-tasks#1822 (closed)

• app/assets/javascripts/environments/components
• app/assets/javascripts/groups/components
• app/assets/javascripts/groups_projects/components
• app/assets/javascripts/import_entities/import_groups/components

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.