Correct the gcs_configuration for etcd periodic job

[Rajalakshmi-Girish]

Correcting the decoration_configuration for the periodic job added periodic-etcd-test-ppc64le. These logs need to be in GCS bucket for them to appear in k8s testgrid.

[ppc64le-cloud-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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

The pull request process is described here

Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/ppc64le-cloud/test-infra/blob/master/OWNERS)~~ [mkumatag] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[ppc64le-cloud-bot]

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

• key test-etcd-periodics.yaml using file config/jobs/periodic/etcd/test-etcd-periodics.yaml

In response to [this](https://github.com/ppc64le-cloud/test-infra/pull/441): >Correcting the `decoration_configuration` for the periodic job added `periodic-etcd-test-ppc64le`. >These logs need to be in GCS bucket for them to appear in k8s testgrid. 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.