Reduce cpu request/limit for capi jobs

[Rajalakshmi-Girish]

Reducing the resource request and limit values from 3000m to 1000m to avoid job failures due to resource unavailability.

Ref: https://ibm-cloudplatform.slack.com/archives/G01CH7AC8H1/p1709276740613729

A couple of test runs: https://prow.ppc64le-cloud.cis.ibm.net/view/gs/ppc64le-kubernetes/logs/periodic-capi-provider-ibmcloud-e2e-powervs/1763525894820859904 https://prow.ppc64le-cloud.cis.ibm.net/view/gs/ppc64le-kubernetes/logs/periodic-capi-provider-ibmcloud-e2e-powervs/1763490552956850176

[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 test-e2e-capi-ibmcloud-periodics.yaml using file config/jobs/periodic/cluster-api-provider-ibmcloud/test-e2e-capi-ibmcloud-periodics.yaml

In response to [this](https://github.com/ppc64le-cloud/test-infra/pull/453): >Reducing the resource request and limit values from `3000m` to `1000m` to avoid job failures due to resource unavailability. > >Ref: https://ibm-cloudplatform.slack.com/archives/G01CH7AC8H1/p1709276740613729 > >A couple of test runs: https://prow.ppc64le-cloud.cis.ibm.net/view/gs/ppc64le-kubernetes/logs/periodic-capi-provider-ibmcloud-e2e-powervs/1763525894820859904 >https://prow.ppc64le-cloud.cis.ibm.net/view/gs/ppc64le-kubernetes/logs/periodic-capi-provider-ibmcloud-e2e-powervs/1763490552956850176 > > > 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.