Move review CI jobs to separate sh files

Ghost User
2020-01-30T13:33:19+01:00

Description

This MR refactors the large complex CI jobs that create and remove the review hosts into Bash scripts.

This has multiple advantages:

No more complex Bash in Yaml (e.g. a heredoc in a multiline Yaml item).

Only executing tasks when needed instead of of using x | true.

Smaller, more readable CI config.