Add MachineHealthCheck to our templates

[joekr]

What would you like to be added:
We should add some basic MHC to our templates so that unhealthy nodes can be handled
MHC docs: https://cluster-api.sigs.k8s.io/tasks/automated-machine-management/healthchecking.html

We should provide a MachineHealthCheck definition for both the control-plane and the machines (excluding machine pools). We will set sane defaults for now.

For more details on this see the proposal: https://github.com/kubernetes-sigs/cluster-api/blob/main/docs/proposals/20191030-machine-health-checking.md and the feature PR: kubernetes-sigs/cluster-api#3830

Why is this needed:
If a node fails to launch or is terminated for some reason we want CAPI to bring up a new node.

[joekr]

In working with MHC I found that setting nodeStartupTimeout: 10m helps as an instance can take a while to come up. `10m1 might be too long, but we should set something higher than whatever the default is.