Update/remove old qa selectors

What does this MR do and why?

Addresses qa selector technical debt as part of #322769 (closed)

• Updates deprecated qa class selectors to data-qa-selectors
• Removes unused selectors
• Adds missing selectors to page objects
• Renames selectors to comply with best practices
• Removes data-qa-selector and .qa-* references within non-QA files

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.