[WIP] remove dependency on cert-manager

[kranurag7]

• remove dependency from cert-manager
• use helm genCA functions to get a self-signed certificate and reference the same in webhooks.

Description

Fix kubewarden/kubewarden-controller#422 (attempts to fix)

Test

To test this pull request, you can run the following commands:

$ cd charts/kubewarden-controller
$ helm template . > manifest.yaml
$ kubectl apply -f manifest.yaml

Additional Information

Tradeoff

Potential improvement

[jvanz]

Hi @kranurag7 ! Thanks for the initiative to work on this issue. However, we decided to follow another approach and manage the certificate in the controller. Therefore, this change is not necessary.

I would like to say sorry if the change on how we will manage the CA is not clear in the issues. And making you spend time on this.