1. Proposed title of this feature request

Expose affinity config in ArgoCD CR

2. What is the nature and description of the request?

Allow adding podAntiAffinity config for all ArgoCD components to be able to achieve the requirement to not run pods on the same node, for HA. 

3. Why does the customer need this? (List the business requirements here)

For High availability of ArgoCD components in case of node-down issues.

4. List any affected packages or components.