Support for SNO+1 provisioning with ZTP/GitOps with a single commit

1. Proposed title of this feature request
Support for SNO+1 provisioning with ZTP/GitOps with a single commit

2. What is the nature and description of the request?
The current procedure for provisioning an SNO+1 cluster with ZTP/GitOps requires a two-step approach: 1. push a commit to create the initial SNO cluster 2. following the creation of it, push another commit to add a worker node.

This request is for the implementation of a simplified procedure which will allow the provisioning of an SNO+1 cluster in one step. This means that the partner will be able to define the SNO+1 cluster in the SiteConfig in the initial commit. The expectation is that the process of provisioning an SNO+1 should take less amount of time, compared to the existing method.

3. Why does the customer need this? (List the business requirements here)
SNO+1 is a topology widely used by telco partners.

4. List any affected packages or components.

RHACM
GitOps/ZTP