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• Readme from docker folder was deleted as it was superseded by the added documentation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

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

• Add new fields to the _STATUS.log and add run_STATUS.log #38
• Labeling Pods for Distributed and Continuous Tests #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

[dryajov]

Looks great!

Maybe we should keep a basic readme around with links to relevant docs, just to help people navigate the repo?