Removed gcp-project definition from migrated jobs

[rjsadow]

Attempt one to get failing periodic jobs back on track.

ref: #30887 (comment)
ref: #30731

/cc @ameukam @dims

[ameukam]

/lgtm
/approve

[k8s-ci-robot]

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[k8s-ci-robot]

@rjsadow: 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:

Attempt one to get failing periodic jobs back on track.

ref: #30887 (comment)
ref: #30731

/cc @ameukam @dims

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