Automatic merge from submit-queue (batch tested with PRs 49842, 50649)

Allow passing image description from e2e node test config

Ref: https://github.com/kubernetes/kubernetes/issues/42926

This is the follow up of https://github.com/kubernetes/kubernetes/pull/50479. In https://github.com/kubernetes/kubernetes/pull/50479, we added the tests for cos-m60 with docker 1.12.6. Those tests use the same image name as the existing ones (cos-m60 with docker 1.13.1). So we are not  distinguish them on node-perf-dash, which categories the tests by image names.

This PR fixes the issue by passing image description to the test.

Examples:

https://storage.googleapis.com/ygg-gke-dev-bucket/e2e-node-test/ci-kubernetes-node-kubelet-benchmark/22/artifacts/performance-cpu-cos-docker112-resource2-resource_35.json

https://storage.googleapis.com/ygg-gke-dev-bucket/e2e-node-test/ci-kubernetes-node-kubelet-benchmark/22/artifacts/performance-cpu-cos-resource2-resource_35.json

**Release note**:

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/assign @Random-Liu