ZH-trans: add feature-state-beta.txt,feature-state-alpha.txt (#11723)

ZH-trans: add feature-state-beta.txt,feature-state-alpha.txt

content/zh/docs/templates/feature-state-alpha.txt

@@ -0,0 +1,19 @@
+
+该功能目前处于 *alpha* 状态，即：
+<!--
+This feature is currently in a *alpha* state, meaning:
+-->
+
+<!--
+* The version names contain alpha (e.g. v1alpha1).
+* Might be buggy. Enabling the feature may expose bugs. Disabled by default.
+* Support for feature may be dropped at any time without notice.
+* The API may change in incompatible ways in a later software release without notice.
+* Recommended for use only in short-lived testing clusters, due to increased risk of bugs and lack of long-term support.
+-->
+
+* 版本名称包含 alpha (例如 v1alpha1)。
+* 可能是 bug， 启用该特性可能会暴露 bug。默认情况下禁用。
+* 对功能的支持可能随时被取消，不会另行通知。
+* 在以后的软件版本中，API 可能会以不兼容的方式进行更改，而无需事先通知。
+* 建议仅在短期测试集群中使用，因为 bug 的风险增加且缺乏长期支持。