Update release process#99

Merged

k8s-ci-robot merged 2 commits intokubernetes-csi:masterfrom

msau42:add-release-process

Oct 5, 2020

Commits on Aug 24, 2020

Add cleanup instructions to release-notes generation
msau42
committed

Commits on Sep 26, 2020

Document new method for adding CI jobs are new K8s versions
msau42
committed