Add etcd repository to preset-pull-registry-sandbox-repo-list

[dims]

We should inject the etcd repo location explicitly for the ci jobs that use the alternate registry proxy. This is a follow up to #25466

Here's how the flow happens for this env variable:
https://cs.k8s.io/?q=etcd_docker_repository&i=fosho&files=&excludeFiles=&repos=kubernetes/kubernetes,kubernetes/test-infra

Signed-off-by: Davanum Srinivas davanum@gmail.com

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[dims]

/assign @ameukam @palnabarun

[ameukam]

/lgtm

[k8s-ci-robot]

@dims: Updated the job-config configmap in namespace default at cluster test-infra-trusted using the following files:

• key gcp-gce.yaml using file config/jobs/kubernetes/sig-cloud-provider/gcp/gcp-gce.yaml

In response to this:

We should inject the etcd repo location explicitly for the ci jobs that use the alternate registry proxy. This is a follow up to #25466

Here's how the flow happens for this env variable:
https://cs.k8s.io/?q=etcd_docker_repository&i=fosho&files=&excludeFiles=&repos=kubernetes/kubernetes,kubernetes/test-infra

Signed-off-by: Davanum Srinivas davanum@gmail.com

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