Bobgy: Update kubeflow-pipeline-frontend-test to use node:12 and adjust command

JobBuild
15358
11-22 18:19
pull-test-infra-bazel 1197942652708851714
pull-test-infra-bazel-canary 1197942652704657408
pull-test-infra-verify-file-perms 1197942652708851713
pull-test-infra-yamllint 1197942652708851712