vincepri: Remove all references to cluster-api-bootstrap-provider-kubeadm

JobBuild
23064
07-29 17:43
pull-test-infra-bazel 1421099163096977408 1420802028715642880
pull-test-infra-gubernator 1421099163134726144 1420802028753391616
pull-test-infra-integration 1421099163256360960 1420802028891803648
pull-test-infra-prow-checkconfig 1421099163218612224 1420802028849860608
pull-test-infra-verify-file-perms 1421099163164086272 1420802028791140352
pull-test-infra-yamllint 1421099163197640704 1420802028820500480