Providers/Templates compatibility based on contracts instead of versions

[Kshatrix]

https://cluster-api.sigs.k8s.io/developer/providers/contracts

Examples:
for core capi current supported contracts are v1alpha3,v1alpha4,v1beta1
for aws:

cluster.x-k8s.io/v1alpha3: v1alpha3
cluster.x-k8s.io/v1alpha4: v1alpha4
cluster.x-k8s.io/v1beta1: v1beta1_v1beta2

For azure and vsphere:

cluster.x-k8s.io/v1beta1: v1beta1

For core capi exposed contracts: v1alpha3,v1alpha4,v1beta1
For providers - expected capi core contracts, supported provider contracts

• if only partially supported (e.g. core only supports v1beta1, but provider supports both v1alpha4 and v1beta1), then only v1beta1 mentioned in the Management status as supported.

For clustertemplates set both expected capi core and provider contracts and validate against the current state of the Management object status.