Panic in test: [sig-network] IngressClass [Feature:Ingress] should prevent Ingress creation if more than 1 IngressClass marked as default [Serial] [Suite:openshift/conformance/serial]

Description of problem:

Found during 1.25 rebase work, test hit this panic in two runs of 4.12-e2e-vsphere-ovn-upi-serial:

https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/openshift-kubernetes-1360-nightly-4.12-e2e-vsphere-ovn-upi-serial/1567239801269129216

https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/openshift-kubernetes-1360-nightly-4.12-e2e-vsphere-ovn-upi-serial/1567066819087306752

Full error for reference:

```github.com/onsi/ginkgo@v4.7.0-origin.0+incompatible/internal/leafnodes/runner.go:107 +0x96
panic({0x766b520, 0xc183570})
    runtime/panic.go:838 +0x207
k8s.io/kubernetes/test/e2e/network.glob..func15.4()
    k8s.io/kubernetes@v1.24.0/test/e2e/network/ingressclass.go:97 +0x284
github.com/onsi/ginkgo/internal/leafnodes.(*runner).runSync(0x300000002?)
    github.com/onsi/ginkgo@v4.7.0-origin.0+incompatible/internal/leafnodes/runner.go:113 +0xb1
github.com/onsi/ginkgo/internal/leafnodes.(*runner).run(0xc002466e40?)
    github.com/onsi/ginkgo@v4.7.0-origin.0+incompatible/internal/leafnodes/runner.go:64 +0x125
github.com/onsi/ginkgo/internal/leafnodes.(*ItNode).Run(0x7f72ca69cfff?)
    github.com/onsi/ginkgo@v4.7.0-origin.0+incompatible/internal/leafnodes/it_node.go:26 +0x7b
github.com/onsi/ginkgo/internal/spec.(*Spec).runSample(0xc003305b30, 0xc00066b208?, {0x8faff00, 0xc00045edc0})
    github.com/onsi/ginkgo@v4.7.0-origin.0+incompatible/internal/spec/spec.go:215 +0x28a
github.com/onsi/ginkgo/internal/spec.(*Spec).Run(0xc003305b30, {0x8faff00, 0xc00045edc0})
    github.com/onsi/ginkgo@v4.7.0-origin.0+incompatible/internal/spec/spec.go:138 +0xe7
github.com/onsi/ginkgo/internal/specrunner.(*SpecRunner).runSpec(0xc002480280, 0xc003305b30)
    github.com/onsi/ginkgo@v4.7.0-origin.0+incompatible/internal/specrunner/spec_runner.go:200 +0xe8
github.com/onsi/ginkgo/internal/specrunner.(*SpecRunner).runSpecs(0xc002480280)
    github.com/onsi/ginkgo@v4.7.0-origin.0+incompatible/internal/specrunner/spec_runner.go:170 +0x1a5
github.com/onsi/ginkgo/internal/specrunner.(*SpecRunner).Run(0xc002480280)
    github.com/onsi/ginkgo@v4.7.0-origin.0+incompatible/internal/specrunner/spec_runner.go:66 +0xc5
github.com/onsi/ginkgo/internal/suite.(*Suite).Run(0xc0004762d0, {0x8fb0260, 0xc002ba2690}, {0x0, 0x0}, {0xc002bb8600, 0x1, 0x1}, {0x8ff18e0, 0xc00045edc0}, ...)
    github.com/onsi/ginkgo@v4.7.0-origin.0+incompatible/internal/suite/suite.go:62 +0x4b2
github.com/openshift/origin/pkg/test/ginkgo.(*TestOptions).Run(0xc0024b28c0, {0xc000311420, 0xc58c8b0?, 0x4f19d80?})
    github.com/openshift/origin/cmd/openshift-tests/openshift-tests.go:448 +0x32
github.com/openshift/origin/test/extended/util.WithCleanup(0xc002527bb8)
    github.com/openshift/origin/test/extended/util/test.go:168 +0xad
main.newRunTestCommand.func1(0xc0024cc780?, {0xc000311420, 0x1, 0x1})
    github.com/openshift/origin/cmd/openshift-tests/openshift-tests.go:448 +0x325
github.com/spf13/cobra.(*Command).execute(0xc0024cc780, {0xc0003113a0, 0x1, 0x1})
    github.com/spf13/cobra@v1.4.0/command.go:856 +0x67c
github.com/spf13/cobra.(*Command).ExecuteC(0xc000c3fb80)
    github.com/spf13/cobra@v1.4.0/command.go:974 +0x3b4
github.com/spf13/cobra.(*Command).Execute(...)
    github.com/spf13/cobra@v1.4.0/command.go:902
main.main.func1(0xc000de1700?)
    github.com/openshift/origin/cmd/openshift-tests/openshift-tests.go:94 +0x8a
main.main()
    github.com/openshift/origin/cmd/openshift-tests/openshift-tests.go:95 +0x476

fail [runtime/panic.go:220]: Test Panicked: runtime error: invalid memory address or nil pointer dereference
Ginkgo exit error 1: exit with code 1
```

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:

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Actual results:

Test hit panic

Expected results:

No panic

Additional info: