Make timer for delayed jobs in environments list dynamic
### Problem
After https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22106 got merged, the timer for delayed jobs in environment list dropdown is not dynamic yet
### Solution
UX has been defined already in https://gitlab.com/gitlab-org/gitlab-ce/issues/52135
> make the timer for delayed jobs in environment list dropdown dynamic (similar to https://gitlab.com/gitlab-org/gitlab-ce/issues/52135).
### What does success look like, and how can we measure that?
Timer for delayed jobs in environment list dropdown is dynamic
### Links / references
issue