Track time on tasks

Problem

See &12396

Acceptance Criteria

• I can view a time tracking report for a single work item (UX: #339759[Time_tracking_report.png])

Release notes

With this release, you can now set time estimates and record time spent on tasks with a quick action or in the time tracking widget in the task's sidebar. Time spent on a task can be viewed with the task's time tracking report.

https://docs.gitlab.com/ee/user/project/time_tracking.html