Support secrets for paladin

[dwertent]

Overview

This PR introduces support for using external secrets for blockchain authentication. Previously, authentication details were specified within spec.config as a blob. With this update, you can reference a secret by name, and if set, the operator will override any authentication details in the config with the data from the specified secret.

Important Notes

• The secret must reside in the same namespace as the resource
• The same credentials will apply to both the HTTP and WS servers
• If there are credentials in the config they will get overwritten by the credentials in the secret

Example Usage

apiVersion: core.paladin.io/v1alpha1
kind: Paladin
spec:
  config: "some blob"
  authConfig:
    authMethod: secret
    authSecret: 
      name: <secret-name>