Add documentation how to run tests in remote Kubernetes

[veaceslavdoina]

This PR contains mainly documentation about automation we implemented for dist-test. Resolve #40.

And also

• Documentation was moved under a separate docs folder
• Files extension was changed from .MD to .md for consistency across repositories and sometimes we use filter for *.md files in GitHub Actions workflows
• Readme from docker folder was deleted as it was superseded by the added documentation

To read the doc in a branch - AUTOMATION.md

---

Automation was not finished yet and some work is still in progress and will be solved separately

• 38

• 39

• Configure Kibana/Grafana access via URL

But this documentation should work as an intro about how we run tests in remote Kubernetes cluster and how we can check the execution status.

@benbierens added some useful fields and now we can see all the tests by categories and their execution status and time