Add `MachineCreationTimeout` to `IroncoreMetalMachine`

[defo89]

Summary

In case a node fails to provision or kubeadm fails to init, a Machine will be stuck in Provisioned forever until this is manually mitigated.

› kubectl get machine kcp-cluster-6k7ws
NAME                   CLUSTER      NODENAME   PROVIDERID                                  PHASE         AGE   VERSION
kcp-cluster-6k7ws      cluster                 metal://capi-runtime/kcp-cluster-6k7ws      Provisioned   17h   v1.31.5

Gardener MCM provides a good guideline we could use in Cluster-API case (others are good, too):

• MachineCreationTimeout: Amount of time after which a machine creation is declared Failed and the machine is replaced by the MachineSet controller.

We could explore adding and handling Machine deletion that have reached MachineCreationTimeout.