Improve formatting of objects in ginkgo failed asserts for lists

[mimowo]

What would you like to be cleaned:

When there is a test failing and the assert is on the list we use excessive formatting, see example here:

see example fragment from https://prow.k8s.io/view/gs/kubernetes-ci-logs/pr-logs/pull/kubernetes-sigs_kueue/10082/pull-kueue-test-e2e-multikueue-main/2036403536677310464

            Spec: {
                Volumes: [
                    {
                        Name: "kube-api-access-vm6mc",
                        VolumeSource: {
                            HostPath: nil,
                            EmptyDir: nil,
                            GCEPersistentDisk: nil,
                            AWSElasticBlockStore: nil,
                            GitRepo: nil,
                            Secret: nil,
                            NFS: nil,
                            ISCSI: nil,
                            Glusterfs: nil,
                            PersistentVolumeClaim: nil,
                            RBD: nil,
                            FlexVolume: nil,
                            Cinder: nil,
                            CephFS: nil,
                            Flocker: nil,
                            DownwardAPI: nil,
                            FC: nil,
                            AzureFile: nil,
                            ConfigMap: nil,
                            VsphereVolume: nil,
                            Quobyte: nil,
                            AzureDisk: nil,
                            PhotonPersistentDisk: nil,

We recently optimized the output for single object, so I assume similar optimizaiton could be made here.

Why is this needed:

To make the failures easier to read.

Also long output in case of lists sometimes exceeds the GH limit for 65k characters making it tricky to copy-paste.

[mimowo]

cc @reruno @mbobrovskyi ptal

[reruno]

/assign