Closes #44096

[ci skip]

This commit extracts `kubectl`, `helm` and `codeclimate` versions as CI
variables.

`kubectl` changes from latest stable version to `1.8.6`, the other two are just
extracted in order to be easily updated; now we can also test tool upgrades
overriding CI secret variables.

New auto-deploy helm chart has new names in order to support Auto Monitoring.

Works with, but does not require charts/charts.gitlab.io!66
See gitlab-ce#38028

Behind an application setting, which defaults to false, this commit
implements the implied CI/CD config. Which means that in the case we
can't find the `.gitlab-ci.yml` on the commit we want to start a
pipeline for, we fall back to an implied configuration.

For now the Bash template has been copied to
`Auto-Devops.gitlab-ci.yml` so the tests actually work.

Fixes #34777