OVN-Kubernetes 1.2 release

[Surya Seetharaman]

Hello all!

The OVN-Kubernetes 1.2 release cut has happened! We have also created a new release-1.2 branch.

Please find the important changes here: https://github.com/ovn-kubernetes/ovn-kubernetes/releases/tag/v1.2.0. Central mode of deployment is officially deprecated now.

Thanks to all the community members and contributors for your contributions to the project!

Please also see the updated release schedule docs: https://ovn-kubernetes.io/developer-guide/release/#release-cadence where we move towards doing 3 releases per year instead of two.

Since 1.2 release is cut, this means we officially stop supporting and backporting things into 1.0 release unless anyone has objections. This is based off of previous conversations we've had where the community supports only 2 releases at a time.

Cheers,

Surya.