fix: add exception for csi snapshot controller on two node

[eggfoobar]

Currently, two node topologies mean that the csi snapshot controller is deployed as a single replica, during upgrades or disruption testing this goes unavailable as its moved around. Here we add a check for two node to support this exception.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: eggfoobar
Once this PR has been reviewed and has the lgtm label, please assign smg247 for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[openshift-ci]

@eggfoobar: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-gcp-ovn	ff46c76	link	true	/test e2e-gcp-ovn
ci/prow/e2e-aws-ovn-kube-apiserver-rollout	ff46c76	link	false	/test e2e-aws-ovn-kube-apiserver-rollout
ci/prow/e2e-aws-ovn-single-node	ff46c76	link	false	/test e2e-aws-ovn-single-node
ci/prow/e2e-gcp-ovn-rt-upgrade	ff46c76	link	false	/test e2e-gcp-ovn-rt-upgrade
ci/prow/e2e-openstack-ovn	ff46c76	link	false	/test e2e-openstack-ovn
ci/prow/e2e-gcp-ovn-techpreview-serial-2of2	ff46c76	link	false	/test e2e-gcp-ovn-techpreview-serial-2of2
ci/prow/e2e-vsphere-ovn-upi	ff46c76	link	true	/test e2e-vsphere-ovn-upi
ci/prow/e2e-aws-ovn-single-node-serial	ff46c76	link	false	/test e2e-aws-ovn-single-node-serial
ci/prow/e2e-metal-ipi-ovn-dualstack-local-gateway	ff46c76	link	false	/test e2e-metal-ipi-ovn-dualstack-local-gateway
ci/prow/e2e-aws-ovn-single-node-upgrade	ff46c76	link	false	/test e2e-aws-ovn-single-node-upgrade
ci/prow/e2e-aws-disruptive	ff46c76	link	false	/test e2e-aws-disruptive

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.