"Auto Replace" option support for RKE2 machine pools

[snasovich]

Detailed Description
For RKE1-provisioned clusters, there is currently an option to specify the threshold on how many minutes a node can be unreachable in a node pool before it's automatically replaced:

For RKE2-provisioned clusters, we want the same functionality to be available, probably by adding a checkbox somewhere on the base pool details section highlighted below:

Context
This is needed for RKE2 provisioning parity with RKE1

Additional Details
Backend support is needed: rancher/rancher#35275

[paynejacob]

ref rancher/rancher#35275

[paynejacob]

See rancher/rancher#35916 (comment) for implementation

Support for self healing node pools was added with the pr above. The following fields were added to support this.

related: https://cluster-api.sigs.k8s.io/tasks/healthcheck.html

• NodeStartupTimeout *metav1.Duration (Duration of time the node is given to initially become ready before it is replaced.)
• UnhealthyNodeTimeout *metav1.Duration (How long a node can be unhealthy before it is replaced)
• MaxUnhealthy *intstr.IntOrString (The maximum number of nodes that can be un healthy in a pool, if this is exceeded no nodes are replaced)
• UnhealthyRange *string (A range of nodes that can be unhealthy and replaced see https://cluster-api.sigs.k8s.io/tasks/healthcheck.html#unhealthy-range for formatting)

[gaktive]

Thanks @paynejacob -- does this mean that UI can being work on this as QA tests the backend?

[paynejacob]

@gaktive yes qa can test backend and the ui work can start. Let me know if you have any questions about the api.

[catherineluse]

@paynejacob It looks like the UI just needs to include the UnhealthyNodeTimeout property when creating the node pool. That isn't case sensitive, right? I noticed that we don't capitalize the other properties that we send when creating the node pool. https://github.com/rancher/rancher/pull/35916/files#diff-e05181e81036cad4014bb4843ea91837fa7dd238dc3434bc4fcc598c56db6428R26

And just to confirm, should we still take the unit from the user in minutes, then convert it to seconds as the Ember UI did?

[paynejacob]

@catherineluse it looks like I accidently capitalized it, I will have a pr up soon to make it lowercase.

[paynejacob]

@catherineluse fixed

[Auston-Ivison-Suse]

Setup For Feature Testing
Rancher Version: v2.6-head(e55a04c)

**Steps for Reproduction: **

1. Start creating a node driver rke2 cluster
2. go to the advanced settings and you will see the option in the screenshot below:

Result
Was able to successfully view the noted amount post provisioning.

Sanity Checks

• successfully provisioned cluster
• successfully edited the yaml to change the values before provisioning.
• successfully edited the values post provisioning via ui
• successfully edited the values post provisioning via yaml

[jtravee]

Confirmed with @catherineluse and @gaktive to add release note label.