169bfbc7f5
Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. apiextensions: add optional comment tags Adds `// +optional` comment tags to fields which are optional/omitempty for CRD types. These tags are used for openapi generation:0cf8f7e6ed/pkg/generators/openapi.go (L361-L362)0cf8f7e6ed/pkg/generators/openapi.go (L81-L89)**Release note**: ```release-note NONE ```