CPEM officially in the K8s Cloud Provider SIG

As of version 3.6.2, Cloud Provider Equinix Metal is officially part of the Kubernetes Cloud Provider Special Interest Group! We are happy to offer up the work we continue to do on CPEM to a larger community and allow broader engagement. You can find (and contribute to) the repo under kubernetes-sigs/cloud-provider-equinix-metal or find Equinix listed in the SIG Cloud Provider community readme. Recent updates include fixed elastic IP annotations for those still using facilities (which are being deprecated) as well as a fix to CPEM's use of MetalLB v0.12.1.