Remove explicit buildbot create command

[Rajalakshmi-Girish]

The explicit kubectl buildkit create command was added in https://github.com/ppc64le-cloud/test-infra/pull/364 as a workaround for the error we faced then. It is now throwing the below error on running buildkit create. The buildkit deployment is created by default when kubectl build command is called. The job is running successfully after this change. https://prow.ppc64le-cloud.cis.ibm.net/view/s3/ppc64le-prow-logs/logs/test-openshift-install-power-build-and-push-on-release/1754749045823246336

[ppc64le-cloud-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mkumatag, Rajalakshmi-Girish

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[ppc64le-cloud-bot]

@Rajalakshmi-Girish: Updated the job-config configmap in namespace prow at cluster default using the following files:

• key openshift-install-power-images.yaml using file config/jobs/ocp-automation/openshift-install-power/openshift-install-power-images.yaml

In response to [this](https://github.com/ppc64le-cloud/test-infra/pull/443): >The explicit `kubectl buildkit create` command was added in https://github.com/ppc64le-cloud/test-infra/pull/364 as a workaround for the error we faced then. >It is now throwing the below error on running buildkit create. >The buildkit deployment is created by default when `kubectl build` command is called. The job is running successfully after this change. >https://prow.ppc64le-cloud.cis.ibm.net/view/s3/ppc64le-prow-logs/logs/test-openshift-install-power-build-and-push-on-release/1754749045823246336 Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.