[DNM] Allow 8gb mem OCP workers

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https://gateway-cloud-softwarefactory.apps.ocp.cloud.ci.centos.org/zuul/t/rdoproject.org/buildset/4515dc6bf6c44fa9a860c9b436c6c133

✔️ openstack-k8s-operators-content-provider SUCCESS in 2h 03m 00s
✔️ podified-multinode-edpm-deployment-crc SUCCESS in 1h 31m 33s
✔️ cifmw-crc-podified-edpm-baremetal SUCCESS in 1h 50m 03s
❌ cifmw-crc-podified-edpm-baremetal-minor-update FAILURE in 31m 57s
✔️ cifmw-pod-zuul-files SUCCESS in 5m 07s
✔️ noop SUCCESS in 0s
✔️ cifmw-pod-ansible-test SUCCESS in 8m 57s
✔️ cifmw-pod-pre-commit SUCCESS in 7m 53s
✔️ cifmw-molecule-reproducer SUCCESS in 15m 28s