[release-1.8] ran codegen with go1.19 & fix linter warnings#13492

knative-prow[bot] merged 3 commits intoknative:release-1.8knative/serving:release-1.8from

knative-prow-robot:cherry-pick-13438-to-release-1.8knative-prow-robot/serving:cherry-pick-13438-to-release-1.8Copy head branch name to clipboard