As a user, I have a use-case where I have 80 machinepools that I want to capture under a single machine-api MachineHealthCheck CustomResource. MachineHealthChecks only select machines based on labels, so it would be nice if I could set a consistent label on all the machines in these 80 machinepools.

Today, Hive machinepools have a way to propagate labels from machinepools --> nodes https://github.com/openshift/hive/blob/227c25916da4c0b1bb3255b7c030d2ccf36384a0/pkg/controller/machinepool/machinepool_controller.go#L618:L623 but in order to propagate the labels down to machines the labels also need to go into .spec.template.metadata.labels of the generated machineset.