Add gocritic

.golangci.yml

cmd/dex/config.go

connector/authproxy/authproxy.go

connector/github/github.go

connector/ldap/ldap.go

server/api_test.go

server/deviceflowhandlers.go

server/deviceflowhandlers_test.go

server/handlers.go

server/server.go

server/server_test.go

server/templates.go

storage/conformance/conformance.go

storage/kubernetes/k8sapi/client.go

storage/sql/config.go

storage/static.go

storage/storage.go