[JIRA] (OVIRT-894) Add support of secrets and credentials in Standard-CI

Add support of secrets and credentials in Standard-CI ----------------------------------------------------- Key: OVIRT-894 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-894 Project: oVirt - virtualization made easy Issue Type: New Feature Components: General Reporter: Barak Korren Assignee: infra Labels: standard-ci Some task we'd like to carry out in Standard-CI require credentials. Examples for such tasks include: # Publishing artifacts to repositories (E.g containers to Dokcerhub, puppet code to Puppetmaster) # Launching remote processes (Check code with remote services) While Jenkins supports storing and managing secret data, we did not enable a way to use this capability from Standard-CI so far.