Remove dependency on cluster-admin role

[nastacio]

Describe the bug
Many of the Cloud Paks installations have dependencies on having the cluster-admin role assigned to the user performing the installation. This is often unnecessary and a problem for many installations, where security policy require minimum privilege assigned to all roles.

To Reproduce
N/A, stated in the installation section of product documentation:

Expected behavior
Remove the assignment of cluster-admin roles to the ArgoCD openshift-gitops-argocd-application-controller service account and replace it with the creation of new Role (or ClusterRole) with the minimum set of privileges required to install the product.

Screenshots
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Additional context
Add any other context about the problem here.

[nastacio]

CP4BA and CP4D have since introduced support for this type of installation, where the cluster admin can authorize a service account with narrower privileges, dedicated to the sole purpose of installing the Pak.