Refactor common Page Objects to use data tags (No. 1 Contd.)

What does this MR do?

See No. 2

Refactor common Page Objects to prefer data-qa-selector over .qa-selector methods of identification.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content