The soil was deployed with an incorrect `PodCIDR` in the past, which in Gardener 1.58 leads to a validation failure for the respective `Seed` resource. Prior to updating to this version, the pod CIDR needs to be patched to the correct CIDR. This can be achieved through a modified gardener-apiserver image (`r.metal-stack.io/gardener/gardener-apiserver:remove-pod-cidr-validation`), built from [this fork branch](https://github.com/gardener/gardener/compare/v1.57.2...metal-stack:gardener:remove-pod-cidr-validation).