Add number of cores used by RabbitMQ nodes to the management overview. (backport #11381)#11382

michaelklishin merged 2 commits intov3.13.xrabbitmq/rabbitmq-server:v3.13.xfrom

mergify/bp/v3.13.x/pr-11381rabbitmq/rabbitmq-server:mergify/bp/v3.13.x/pr-11381Copy head branch name to clipboard