Generated operator deployment still tries to create the CRD

In 1.2 we've changed the permissions required so that we do not need to have a clusterrole (which can create a CRD).

To compensate for this we've added this step to the docs as a manual user step - https://docs-staging.couchbase.com/operator/1.2/install-kubernetes.html#install-the-crd.

The problem is that the operator.yaml file that we generate still has the flag --create-crd set, so this means it will still try to create the CRD (which it has no permission to do).

We need to remove this flag otherwise people won't be able to deploy the operator. Note that this does not involve a code change to the actual operator itself, just the deployment manifest file.