Skip Proxy update test on HyperShift cluster

Signed-off-by: chiragkyal <ckyal@redhat.com>

Author: chiragkyal

test/e2e/trustmanager_test.go

@@ -12,6 +12,7 @@ import (
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
 
+	configopenshiftv1 "github.com/openshift/api/config/v1"
 	"github.com/openshift/cert-manager-operator/api/operator/v1alpha1"
 	testutils "github.com/openshift/cert-manager-operator/pkg/controller/istiocsr"
 	operatorclientv1alpha1 "github.com/openshift/cert-manager-operator/pkg/operator/clientset/versioned/typed/operator/v1alpha1"
@@ -828,6 +829,13 @@ var _ = Describe("TrustManager", Ordered, Label("Platform:Generic", "Feature:Tru
 			const openshiftConfigNS = "openshift-config"
 			const userCABundleName = "user-ca-bundle"
 
+			By("checking if cluster has external control plane (HyperShift) — Proxy is immutable there")
+			infra, err := configClient.Infrastructures().Get(ctx, "cluster", metav1.GetOptions{})
+			Expect(err).ShouldNot(HaveOccurred())
+			if infra.Status.ControlPlaneTopology == configopenshiftv1.ExternalTopologyMode {
+				Skip("Proxy/cluster is immutable on HostedCluster (external control plane)")
+			}
+
 			createTrustManager(ctx, newTrustManagerCR().WithDefaultCAPackage(v1alpha1.DefaultCAPackagePolicyEnabled))
 
 			// --- Capture baseline state ---