When handling big Kubernetes objects, marshalling objects is memory
intense. This can be reproduced with the end-to-end test
`TestPrometheusRulesExceedingConfigMapLimit`. This patch doubles the
memory request and limit of the Prometheus Operator deployment to 100mb
and 200mb.
89fc4e306972604eba2dcb961a6d29cc27a668ad introduced the new Prometheus
rule file custom resource definition. This patch adjusts the
kube-prometheus project to use the new custom resource definition.