Remove the --cluster flag to gcp's e2e jobs

[Rajalakshmi-Girish]

The --cluster flag that passes name to CI k8s e2e jobs is not required as the prow jobs are on BOSKOS
Ref: #33927 (comment)

Most of the jobs that run against master branch for gcp are not passing this value in https://github.com/kubernetes/test-infra/blob/master/config/jobs/kubernetes/sig-cloud-provider/gcp/gcp-gce.yaml. But a few have empty flag --cluster=

Removing the flag from https://github.com/kubernetes/test-infra/blob/master/config/jobs/kubernetes/generated/generated.yaml and also from releng's config file test_config.yaml

[dims]

/approve
/lgtm

@Rajalakshmi-Girish thanks! same deal as before, please check these jobs to make sure they are still working in a day or so (fresh runs)

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dims, Rajalakshmi-Girish

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Needs approval from an approver in each of these files:

• config/jobs/kubernetes/generated/OWNERS [dims]
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[k8s-ci-robot]

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

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

In response to this:

The --cluster flag that passes name to CI k8s e2e jobs is not required as the prow jobs are on BOSKOS
Ref: #33927 (comment)

Most of the jobs that run against master branch for gcp are not passing this value in https://github.com/kubernetes/test-infra/blob/master/config/jobs/kubernetes/sig-cloud-provider/gcp/gcp-gce.yaml. But a few have empty flag --cluster=

Removing the flag from https://github.com/kubernetes/test-infra/blob/master/config/jobs/kubernetes/generated/generated.yaml and also from releng's config file test_config.yaml

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[Rajalakshmi-Girish]

please check these jobs to make sure they are still working in a day or so (fresh runs)

Yes Jobs seem to work fine after this change.
I looked at fresh runs of some master and release branch periodic jobs from https://testgrid.k8s.io/sig-release-master-informing ; https://testgrid.k8s.io/sig-release-1.32-blocking, etc.
I am yet to confirm on some presubmits that changed. I have a hurdle fetching their urls.
Posted for help here https://kubernetes.slack.com/archives/CCK68P2Q2/p1735235841755249