[DOC]: Improve OpenShift operator documentation

[alonsocamaro]

Title

Improve OpenShift operator documentation

Description

At present:

• There is no information on on what is the difference weather the operator should be installed for all namespaces or in a separate namespace. I find that in both the operand allows to:

  • Specify where the instances are deployed (spec.namespace parameter)
  • Which CIS namespaces will be able to watch

  Some guidelines should be provided to clarify the namespace usage for the operator, and where the CIS is installed.

• There are no general guidelines on how to setup the operand.

• The following section applies when deploying an operand, not the operator IMHO

  
  Before you install CIS using Operators on OpenShift, you must create BIG-IP login credentials to use with Operator Helm Charts:

oc create secret generic -n kube-system --from-literal=username= --from-literal=password=

[trinaths]

Created [CONTCNTR-4950] for internal tracking.