Get backplane latest version

[samanthajayasinghe]

Why

We have to update docker file to get the backplane's latest version. This PR will point to the latest backplane version always.

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

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[openshift-merge-robot]

PR needs rebase.

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[T0MASD]

we currently don't use latest in ocm-container build, backplane tools together with periodic build should solve this

[T0MASD]

/close

[openshift-ci[bot]]

@T0MASD: Closed this PR.

In response to [this](https://github.com/openshift/ocm-container/pull/232#issuecomment-1792071554): >/close 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.