Bump traefik, golang.org/x/net, google.golang.org/grpc #5893

Job	Run time
build / Build	12m 43s
Integration Tests (certrotation)	3m 2s
Integration Tests (etcdrestore)	3m 11s
Integration Tests (localstorage)	2m 45s
Integration Tests (startup)	8m 8s
Integration Tests (custometcdargs)	59s
Integration Tests (etcdsnapshot)	8m 25s
Integration Tests (kubeflags)	7m 24s
Integration Tests (longhorn)	3m 15s
Integration Tests (secretsencryption)	3m 28s
	53m 20s

Provide feedback