CNF-13014: Align dockerfile ocp version

[fontivan]

• Since master branch is used for 4.18, we should be using the 4.18 OCP image here like we do in Dockerfile.rhel9 and .ci-operator.yaml

[openshift-ci-robot]

@fontivan: This pull request references CNF-13014 which is a valid jira issue.

In response to this:

• Since master branch is used for 4.18, we should be using the 4.18 OCP image here like we do in Dockerfile.rhel9 and .ci-operator.yaml

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 openshift-eng/jira-lifecycle-plugin repository.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: fontivan
Once this PR has been reviewed and has the lgtm label, please assign dagrayvid for approval. For more information see the Kubernetes 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]

@fontivan: all tests passed!

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.