Re-Add datetime parameter to time_ago component

What does this MR do and why?

This MR adds the datetime property to the time_ago component like it was in 14.7.0
It improves accessibility because screen readers mostly use this field to identify the date which this field should describe. Also it makes it possible for scripts in the browser to parse the date properly.

How to set up and validate locally?

As I don't work locally, I don't really know. But as I don't change any code of the application logic, it should be just checking out the branch and starting the application. The change is only visible in the DOM of the Jobs table from a pipeline

Screenshots or screen recordings

None, the change is not visible in the UI and only improves accessibility with a property inside the DOM

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.

Closes #352068 (closed)