Update statickcheck for Go 1.18

[adrianludwin]

Tested: static check fails on Go 1.18 without this change, passes with
it.

[k8s-ci-robot]

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[adrianludwin]

/assign @rjbez17
/assign @erikgb

[erikgb]

@adrianludwin This does not seem to work using Go 1.17, and I do not think we should require 1.18 before K8s is fully migrated to 1.18. I get the same error as the CI when trying to build your branch:

D:~/projects/github/hierarchical-namespaces $ go version
go version go1.17.8 linux/amd64
D:~/projects/github/hierarchical-namespaces $ make
go build -o /home/erikbo/projects/github/hierarchical-namespaces/bin/controller-gen sigs.k8s.io/controller-tools/cmd/controller-gen
/home/erikbo/projects/github/hierarchical-namespaces/bin/controller-gen object:headerFile=./hack/boilerplate.go.txt paths=./api/...
gofmt -l -w ./api ./cmd ./internal
go vet ./api/... ./cmd/... ./internal/...
go build -o /home/erikbo/projects/github/hierarchical-namespaces/bin/staticcheck honnef.co/go/tools/cmd/staticcheck
/home/erikbo/projects/github/hierarchical-namespaces/bin/staticcheck ./api/... ./cmd/... ./internal/...
internal/kubectl/configset.go:81:2: this linter directive didn't match anything; should it be removed? (staticcheck)
make: *** [Makefile:206: staticcheck] Error 1
D:~/projects/github/hierarchical-namespaces $ 

[erikgb]

/lgtm