pull-capi-ibm-make: update resources

[xmudrii]

Done as part of the Contributor Summit workshop and efforts to reduce requests for jobs that are not using requested resources.

Relevant dashboards:

• https://monitoring-eks.prow.k8s.io/d/53g2x7OZz/jobs?orgId=1&var-org=kubernetes-sigs&var-repo=cluster-api-provider-ibmcloud&var-job=pull-cluster-api-provider-ibmcloud-make&viewPanel=128&from=1710833729992&to=1710853036718
• https://monitoring-eks.prow.k8s.io/d/53g2x7OZz/jobs?orgId=1&var-org=kubernetes-sigs&var-repo=cluster-api-provider-ibmcloud&var-job=pull-cluster-api-provider-ibmcloud-make&viewPanel=180&from=1710833250687&to=1710854767381

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

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• config/jobs/kubernetes-sigs/cluster-api-provider-ibmcloud/OWNERS

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[rjsadow]

/lgtm

[mkumatag]

can you please update the requests in the other files in the same folder for the different branches?