Automated process for changelog generation and refactoring of the changelog structure

type:Internal

Add an automated process to generate changelog via Pipeline. The process gonna generate the changelog via MR information. The Pipeline will be stopped and wait manual action to publish a new changelog entry. The changelog format has been refactored to. Now entries are grouped by type. Type are: breaking|added|fixed|changed|deprecated|removed|performance|internal|other|none A description markdown formatted is also available on the new changelog pages.

Documentation is available under .ci/changelog

This MR will be accompanied with a new MR description template.