Create autoscaling docker machine deletion histogram
Overview
We already have a metrics named gitlab_runner_autoscaling_machine_creation_duration_seconds
to create a histogram for machine creations so we can understand how much time it takes to create a machine. During a rollout of a new OS we had to similar information but for machine deletion.
Instead of parsing logs we should have a metric for example gitlab_runner_autoscaling_machine_removal_duration_seconds
which tracks the time it takes to remove a machine.