pacoxu: Automated cherry pick of #114093: use etcd 3.5.6-0 after promotion

JobBuild
6376007b
11-24 09:18		 114105
11-24 09:10		 b30fb2a4
11-24 09:08
pull-kubernetes-conformance-kind-ga-only-parallel 1598683892951289856 1595708496660140032 1595705955696250880
pull-kubernetes-conformance-kind-ipv6-parallel 1595708489827618816 1595705955486535680
pull-kubernetes-dependencies 1598683882876571648 1595708490783920128 1595705955524284416
pull-kubernetes-e2e-gce-100-performance 1598683880364183552 1595708495007584256 1595705955448786944
pull-kubernetes-e2e-gce-ubuntu-containerd 1598683878690656256 1595708486824497152 1595705955297792000
pull-kubernetes-e2e-kind 1598683887897153536 1595708492889460736 1595705955603976192
pull-kubernetes-e2e-kind-ipv6 1598683890426318848 1595708494147751936 1595705955645919232
pull-kubernetes-integration 1598683885380571136 1595708491622780928 1595705955562033152
pull-kubernetes-node-e2e-containerd 1598683887192510464 1595708488154091520 1595705955385872384
pull-kubernetes-typecheck 1598683898554880000 1595708498371416064 1595705956950347776
pull-kubernetes-unit 1598683895476260864 1595708498346250240 1595705956124069888
pull-kubernetes-verify 1598683901067268096 1595708500460179456 1595705957801791488
pull-kubernetes-verify-govet-levee 1598683878740987904 1595708487311036416 1595705955352317952