Allow to scale up the operator pods by using the Helm Chart

[sbilque]

SUMMARY

This PR allows to change then number of operator instance by using the Helm Chart.

ISSUE TYPE

• New or Enhanced Feature

ADDITIONAL INFORMATION

• This feature is controled with the Operator.replicas parameter. By default, le number of replicas is 1.
• The ability to change the number of operator replicas is useful when the deployment tool policies are configured to require a number of pods greater than 1 to ensure high availability.

Example configuration of operator replicas:

AWX:
  enabled: false
  ...
Operator:
  replicas: 2