OpenStack provider allow setting disablePortSecurity in MachineDeployment

[sspreitzer]

Problem

We cannot use a routing based Kubernetes CNI as OpenStack port security does prevent IP and MAC spoofing. Disabling the port security in OpenStack does allow Kubernetes CNI such as Cilium to use native routing.

Kubermatic's machine-controller does not support setting disablePortSecurity. Please implement this setting, which is already present in newer cluster-api.

Reference

machine-controller/pkg/cloudprovider/provider/openstack/provider.go

Lines 96 to 99 in 1302066

	// Machine details
	Image string
	Flavor string
	SecurityGroups []string

[csengerszabo]

Internal reference: 9038