Merge pull request kubernetes-sigs#2817 from k8s-infra-cherrypick-rob…

…ot/cherry-pick-2813-to-release-0.18

[release-0.18] 🐛 Reintroduce AddMetricsServerExtraHandler on manager

Merge pull request kubernetes-sigs#2815 from k8s-infra-cherrypick-rob…

…ot/cherry-pick-2813-to-release-0.17

[release-0.17] 🐛 Reintroduce AddMetricsServerExtraHandler on manager

Merge pull request kubernetes-sigs#2816 from k8s-infra-cherrypick-rob…

…ot/cherry-pick-2813-to-release-0.16

[release-0.16] 🐛 Reintroduce AddMetricsServerExtraHandler on manager

Merge pull request kubernetes-sigs#2809 from k8s-infra-cherrypick-rob…

…ot/cherry-pick-2806-to-release-0.18

[release-0.18] 🐛 correct kind source type

Merge pull request kubernetes-sigs#2807 from k8s-infra-cherrypick-rob…

…ot/cherry-pick-2805-to-release-0.17

[release-0.17] 🐛 Cache: Fix label defaulting of byObject when namespaces are configured

Merge pull request kubernetes-sigs#2796 from alvaroaleman/mark

📖  Mark Typed Handlers as experimental

Merge pull request kubernetes-sigs#2761 from k8s-infra-cherrypick-rob…

…ot/cherry-pick-2757-to-release-0.17

[release-0.17] 🐛 Runnable group should check if stopped before enqueueing

Merge pull request kubernetes-sigs#2688 from k8s-infra-cherrypick-rob…

…ot/cherry-pick-2687-to-release-0.17

[release-0.17] 🐛 Fix lazy rest mapper cache invalidation

Merge pull request kubernetes-sigs#2689 from g-gaston/fix-cache-inval…

…idation-for-unsync-caches-backport-0-16

[release-0.16] 🐛 Fix lazy rest mapper cache invalidation

Merge pull request kubernetes-sigs#2676 from k8s-infra-cherrypick-rob…

…ot/cherry-pick-2663-to-release-0.17

[release-0.17] 🐛 Clean restmapper cache if a version is notFound