Release NRI with the same process as containerd

[chrishenzie]

containerd appears to follow a different release process (containerd/containerd#11356) that uses the release-tool for building notes.

NRI release notes have their own format. Is this generated a different way or done by hand? Would it be worth migrating NRI to this same release process to consolidate them across projects?

[samuelkarp]

NRI release notes are usually generated by GitHub's automatic release note generation. This is a newer thing that didn't exist when the containerd project started (and didn't exist when @dmcgowan wrote the release-tool). For our less-complicated subprojects like NRI we've generally been fine with the GitHub feature since it is simpler to use. release-tool has some nice advanced features for dealing with dependencies and for labeling which are really useful for the main containerd repository, but aren't as critical here.