- remove hiding the alert functionality
- use `danger` class instead of `warning`

https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14786

It also prepare for the EE merge request https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14786

- Remove setTimeout calls
- Add helper function to encapsulate setup

Change sidebar's renderBlock() to return true only if
any of the block's <detail-row>s will be rendered
Change block to render only if renderBlock() returns true

Adds Job specific variables to facilitate specifying variables when
running manual jobs.

Fixed the broken frontend unit tests

Added the ability to display an error for unmet prerequisites

When the job is archieved we render a affixed warning
on the top of the job log