implement OLMv0 (ordering only, like here) #3762
Description
- https://github.com/operator-framework/operator-lifecycle-manager/blob/master/pkg/package-server/provider/registry.go#L329-L343
- https://github.com/operator-framework/operator-registry/blob/master/pkg/lib/semver/semver.go#L11
Leverage new composite version methods (i.e. model.Compare, declcfg.Compare) wherever possible.