fr: support FIPs on worker nodes

[okozachenko1203]

Context

Magnum is designed to assign floating IP(FIP)s to all cluster nodes once floating_ip_enabled is set as true in coe cluster template. This func is missing in mcapi driver because CAPO didn't support machine FIP at the initial stage of mcapi project. Now we have some requests for this func and also CAPO supports it already.

https://github.com/kubernetes-sigs/cluster-api-ipam-provider-in-cluster https://github.com/kubernetes-sigs/cluster-api-provider-openstack/pull/1763 https://github.com/kubernetes-sigs/cluster-api-provider-openstack/pull/1762 https://github.com/kubernetes-sigs/cluster-api-provider-openstack/issues/1750

high level of implementation

when floating_ip_enabled equals true,

• [ ] upgrade capo to 0.10.0> (which includes https://github.com/kubernetes-sigs/cluster-api-provider-openstack/pull/1763 https://github.com/kubernetes-sigs/cluster-api-provider-openstack/pull/1762)
• [ ] create a OpenStackFloatingIPPool CR
• [ ] set spec.floatingIPPoolRef of openstackMachineTemplate for worker nodes using the above CR name
• [ ] (optional) wait/check IPAddressClaim until fulfilling or FIP assignment

[okozachenko1203]

@mnaser what are your thoughts on this?