1. Proposed title of this feature request

• Allow deploying cert-manager components in a high available configuration

2. What is the nature and description of the request?

• The cert-manager operator currently does not allow to change the number of replicas for the components it manages, and each component only runs 1 replica. We should be able to control the number of replicas in order to deploy these controllers in a highly available configuration.
• According to the cert-manager's best practices documentation, the recommendation for a production environment is to run 2 replicas of the controller and the cainjector, and at least 3 replicas of the webhook.

       cert-manager HA documentation - https://cert-manager.io/docs/installation/best-practice/#high-availability

3. Why does the customer need this? (List the business requirements here)

• To have cert-manager components in a high available configuration. The customer  run into a scenario where the webhook was stuck, cert-manager fell into a degraded state, and it caused other issues for things that relied on cert-manager

4. List any affected packages or components.

• cert-manager