Helm ready Quickstarters - sunsetting tailor

[gerardcl]

Is your feature request related to a problem? Please describe.
Tailor is a self-developed component of OpenDevStack (ODS) whose active development has ceased and is logically superseded by Helm.
As a user I require having control of the k8s resources I need for my components/deployments (actively or passively).
As a support team member of ODS I can give better/faster support if resources are defined as code, in the same repository.

Describe the solution you'd like
We want to provide a base chart in the most generic ODS quickstarter component, in the docker-plain. This will be the baseline for the other ODS quickstarters and for existing components in existing running ODS installations.

We want to provide such baseline with proper documentation of how to use common resources: Environment vars, config maps, secrets, storage, replicas, resource requirements, metadata, network policies, cert-manager, ...

We want to transition from the deprecated DeploymentConfig resource type to Deployment.

We want to provide a change that is not a hard-cut from tailor but provides a transition process and proper sunsetting of if.

Describe alternatives you've considered
N/A

Additional context
When looking at the different user types of ODS, we will benefit from Helm charts, as it:

• pushes usage of IaC with already backed-in good practices and good defaults
• helps on faster support from platforms team
• empowers users to self-configure/fix by proper FAQs/HowTos and because of using a industry standard (Helm), that has great documentation.

[tbugfinder]

#959
#964
#965