k8s: Relax CRD upgrade check
k8s: Relax CRD upgrade check

Previously, we only wanted to update a CRD when the CRD has an
out-of-date schema version (which is inside the label
"io.cilium.k8s.crd.schema.version".)

Some CRDs like CiliumNode (CN) had a validation schema, but did not have
a schema version (label mentioned above). This commit will allow all
CRDs like CN to be updated, because it removes the check for the
existance of the label.

Signed-off-by: Chris Tarazi <711c73f64afdce07b7e38039a96d2224209e9a6c@isovalent.com>

tklauser/cilium,michi-covalent/cilium,tklauser/cilium,tgraf/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,tgraf/cilium,michi-covalent/cilium,michi-covalent/cilium,tgraf/cilium,tklauser/cilium,tgraf/cilium,cilium/cilium,tklauser/cilium,tgraf/cilium,cilium-team/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,tgraf/cilium,cilium-team/cilium,cilium/cilium