chore: Remove KFP presubmit kubeflow-pipelines-manifests tests prow config

[VaniHaripriya]

As part of the migration from Prow to GH Action Workflows for KFP, we have a PR proposed to migrate presubmit kubeflow-pipelines-manifests tests to a GHA:

• https://github.com/kubeflow/pipelines/pull/11066

This PR removes presubmit kubeflow-pipelines-manifests from the prow config in parallel.

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[google-oss-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chensun, VaniHaripriya

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[google-oss-prow[bot]]

@VaniHaripriya: Updated the job-config configmap in namespace default at cluster default using the following files:

• key kubeflow-pipelines-presubmits.yaml using file prow/prowjobs/kubeflow/pipelines/kubeflow-pipelines-presubmits.yaml

In response to [this](https://github.com/GoogleCloudPlatform/oss-test-infra/pull/2336): >As part of the migration from Prow to GH Action Workflows for KFP, we have a PR proposed to migrate presubmit kubeflow-pipelines-manifests tests to a GHA: > >- https://github.com/kubeflow/pipelines/pull/11066 > >This PR removes presubmit kubeflow-pipelines-manifests from the prow config in parallel. > > Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.