explore using openshift's CA for truststore generation

This will be the second step of the ssl improvement:

Now that we have should access to OpenShift CA, look into using CA configmap when it exists... for truststore use.

https://github.com/kiegroup/kie-cloud-operator/blob/ab9cb68268f90ccad85d5c884ee0cae21e7229c6/pkg/controller/kieapp/shared/utils.go#L52 

• rely on OCP CA
• WIP: https://github.com/kiegroup/kie-cloud-operator/pull/492/files
• required label to use ocp’s ca.
  • https://github.com/kiegroup/kie-cloud-operator/blob/main/pkg/controller/kieapp/deploy_ui.go#L364

• If a user can’t rely on ocp’s one, we can improve the existing code to generated the keystore with valid hostnames.

For further information please refer to the linked BAPL.