Fix job type check

[cartermckinnon]

Description of changes:

The check for Kind is not effective, we need to revert to the previous impl, but use the MPIJobFacade.

aws-k8s-tester/e2e2/internal/framework_extensions/client.go

Lines 133 to 140 in 9bdcb4f

	switch job.(type) {
	case *kubeflowv2beta1.MPIJob:
	jobLabel = fmt.Sprintf("job-name=%s-launcher", job.GetName())
	case *batchv1.Job:
	jobLabel = fmt.Sprintf("job-name=%s", job.GetName())
	default:
	return "", fmt.Errorf("unsupported job type %T", job)
	}

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