Console supports Operator to specify where (on infra/master/worker node) to run with CSV suggested namespace template annotation

Problem

As an Operator author, I want to be able to specify where my Operators to run (on infra, master, or worker nodes) so my end-users can easily install them through OperatorHub in the console without special setups.

Acceptance Criteria

• Operators can assign a Namespace object template in YAML to the provided `operatorframework.io/suggested-namespace-template` CSV annotation to specify how the suggested namespace is being created by the console during the installation.

• During the installation, UI will:
• populate the "Installed Namespace" dropdown using the `metadata.name` field in the attached Namespace YAML manifest
• create the namespace object using the Namespace YAML manifest being assigned to `operatorframework.io/suggested-namespace-template` CSV annotation.
• If end-users change the "Installed Namespace" dropdown to another namespace, the UI shows warning messages so users know the user-selected namespace might not have all the correct setup recommended by the Operator and it might not run correctly/successfully.
• If both `suggested-namespace` and `suggested-namespace-template` annotation are present in CSV template should take precedence.

Details

The console adds support to take the value field of a CSV annotation as the Namespace YAML template to create a Namespace object for installing the Operator.

CSV Annotation Example

apiVersion: v1
kind: Namespace
metadata:
  annotations:
    openshift.io/node-selector: ""
  name: my-operator-namespace