JornShen: cherry pick of #100913: no watch endpointslice in userpace mode

JobBuild
101504
04-27 01:46
87e34b35
04-27 01:44
pull-kubernetes-conformance-kind-ga-only-parallel 1389618880627871744 1386858828707926016
pull-kubernetes-dependencies 1389618879860314112 1386858827952951296
pull-kubernetes-e2e-gce-100-performance 1389618879839342592 1386858827940368384
pull-kubernetes-e2e-gce-ubuntu-containerd 1389618879789010944 1386858827885842432
pull-kubernetes-e2e-kind 1389618879902257152 1386858828007477248
pull-kubernetes-e2e-kind-ipv6 1389618879986143232 1386858828116529152
pull-kubernetes-integration 1389618879881285632 1386858827978117120
pull-kubernetes-node-e2e 1389618879809982464 1386858827898425344
pull-kubernetes-typecheck 1389618879923228672 1386858828028448768
pull-kubernetes-unit 1389618881475121152 1386858829555175424
pull-kubernetes-verify 1389618879948394496 1386858828070391808
pull-kubernetes-verify-govet-levee 1389618879969366016 1386858828070391809