Feat: add kubeadm_config_api_version default variable

If kube_version is v1.31 or higher, it will be v1beta4, otherwise it
will be v1beta3.

Signed-off-by: ChengHao Yang <17496418+tico88612@users.noreply.github.com>

roles/kubespray-defaults/defaults/main/main.yml

@@ -26,6 +26,10 @@ kube_version_min_required: v1.29.0
 ## Kube Proxy mode One of ['iptables', 'ipvs']
 kube_proxy_mode: ipvs
 
+# Kubeadm config api version
+# If kube_version is v1.31 or higher, it will be v1beta4, otherwise it will be v1beta3.
+kubeadm_config_api_version: "{{ 'v1beta4' if kube_version is version('v1.31.0', '>=') else 'v1beta3' }}"
+
 ## The timeout for init first control-plane
 kubeadm_init_timeout: 300s