Add dynamic timer to delayed jobs

What does this MR do?

Dynamically update remaining time of delayed jobs

• in job sidebar
• in pipeline graph
• on single job page (empty state)

What are the relevant issue numbers?

part of https://gitlab.com/gitlab-org/gitlab-ce/issues/52135

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides