WIP: Revert kubernetes upgrade

We don't need to upgrade the version of kubernetes we are testing,
and it looks like we may not work with the latest version.

Author: justinsb

test/e2e/config/gcp-ci.yaml

@@ -78,16 +78,16 @@ providers:
       - sourcePath: "${PWD}/test/e2e/data/infrastructure-gcp/withclusterclass/cluster-template-ci-gke-autopilot-topology.yaml"
 
 variables:
-  KUBERNETES_VERSION: "v1.33.2"
-  KUBERNETES_VERSION_MANAGEMENT: "v1.33.2"
+  KUBERNETES_VERSION: "v1.32.5"
+  KUBERNETES_VERSION_MANAGEMENT: "v1.32.5"
   ETCD_VERSION_UPGRADE_TO: "3.5.16-0"
   COREDNS_VERSION_UPGRADE_TO: "v1.11.3"
   KUBERNETES_IMAGE_UPGRADE_FROM: "projects/k8s-staging-cluster-api-gcp/global/images/cluster-api-ubuntu-2204-v1-32-5-nightly"
-  KUBERNETES_IMAGE_UPGRADE_TO: "projects/k8s-staging-cluster-api-gcp/global/images/cluster-api-ubuntu-2204-v1-33-2-nightly"
+  KUBERNETES_IMAGE_UPGRADE_TO: "projects/k8s-staging-cluster-api-gcp/global/images/cluster-api-ubuntu-2204-v1-31-0-nightly"
   CONTROL_PLANE_MACHINE_TEMPLATE_UPGRADE_TO: "cp-k8s-upgrade-and-conformance"
   WORKERS_MACHINE_TEMPLATE_UPGRADE_TO: "worker-k8s-upgrade-and-conformance"
-  KUBERNETES_VERSION_UPGRADE_TO: "${KUBERNETES_VERSION_UPGRADE_TO:-v1.33.2}"
-  KUBERNETES_VERSION_UPGRADE_FROM: "${KUBERNETES_VERSION_UPGRADE_FROM:-v1.32.5}"
+  KUBERNETES_VERSION_UPGRADE_TO: "${KUBERNETES_VERSION_UPGRADE_TO:-v1.32.5}"
+  KUBERNETES_VERSION_UPGRADE_FROM: "${KUBERNETES_VERSION_UPGRADE_FROM:-v1.31.0}"
   EXP_CLUSTER_RESOURCE_SET: "true"
   CLUSTER_TOPOLOGY: "true"
   # Cluster Addons