Use the default strings of timeago.js for timeago

What does this MR do?

Replaces strings for timeago tooltips (originally introduced from a jQuery timeago plugin) with the default strings of timeago.js.

Are there points in the code the reviewer needs to double check?

No.

Why was this MR needed?

about a minute ago or about %s hours ago (especially about) is more redundant than informational.

Screenshots (if relevant)

n/a

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• [n/a] Documentation created/updated
• [n/a] API support added
• Tests added for this feature/bug
• Conform by the code review guidelines
  • Has been reviewed by a UX Designer
  • Has been reviewed by a Frontend maintainer
  • [n/a] Has been reviewed by a Backend maintainer
  • [n/a] Has been reviewed by a Database specialist
• Conform by the merge request performance guides
• Conform by the style guides
• If you have multiple commits, please combine them into a few logically organized commits by squashing them
• [n/a] Internationalization required/considered
• [n/a] End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?

Closes #47182 (closed)