Add e2e test case for image selector

Update e2e test base image to 1.30.7.

test/e2e/capic_test.go

@@ -121,3 +121,18 @@ var _ = Describe("Should be able to create a cluster with 1 control-plane using
 		}
 	})
 })
+
+var _ = Describe("Running the workload cluster upgrade spec [K8s-Upgrade]", func() {
+	capie2e.ClusterUpgradeConformanceSpec(ctx, func() capie2e.ClusterUpgradeConformanceSpecInput {
+		return capie2e.ClusterUpgradeConformanceSpecInput{
+			E2EConfig:             e2eConfig,
+			ClusterctlConfigPath:  clusterctlConfigPath,
+			BootstrapClusterProxy: bootstrapClusterProxy,
+			ArtifactFolder:        artifactFolder,
+			SkipCleanup:           skipCleanup,
+			Flavor:                ptr.To("image-selector"),
+			PostNamespaceCreated:  cloudEnv.createCredentialsSecretPNC,
+			SkipConformanceTests:  true,
+		}
+	})
+})

test/e2e/config/ionoscloud.yaml

@@ -65,12 +65,15 @@ providers:
           - sourcePath: "../../../metadata.yaml"
           - sourcePath: "../data/infrastructure-ionoscloud/cluster-template.yaml"
           - sourcePath: "../data/infrastructure-ionoscloud/cluster-template-ipam.yaml"
+          - sourcePath: "../data/infrastructure-ionoscloud/cluster-template-image-selector.yaml"
 variables:
   # Default variables for the e2e test; those values could be overridden via env variables, thus
   # allowing the same e2e config file to be re-used in different Prow jobs e.g. each one with a K8s version permutation.
   # The following Kubernetes versions should be the latest versions with already published kindest/node images.
   # This avoids building node images in the default case which improves the test duration significantly.
-  KUBERNETES_VERSION: "v1.29.2"
+  KUBERNETES_VERSION: "${KUBERNETES_VERSION:-1.30.7}"
+  KUBERNETES_VERSION_UPGRADE_FROM: "${KUBERNETES_VERSION_UPGRADE_FROM:-1.30.7}"
+  KUBERNETES_VERSION_UPGRADE_TO: "${KUBERNETES_VERSION_UPGRADE_TO:-1.31.3}"
   CNI: "./data/cni/calico.yaml"
   KUBETEST_CONFIGURATION: "./data/kubetest/conformance.yaml"
   CLUSTER_NAME: "e2e-cluster-${RANDOM}"