完善 yudao-spring-boot-starter-env 组件，完成 dubbo 组件

yudao-dependencies/pom.xml

@@ -247,6 +247,11 @@
                 <artifactId>dubbo-common</artifactId> <!-- 兜底，保证在不引入 spring-cloud-starter-dubbo 时，注解等不报错 -->
                 <version>${dubbo.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.apache.dubbo</groupId>
+                <artifactId>dubbo-cluster</artifactId> <!-- 兜底，保证在不引入 spring-cloud-starter-dubbo 时，注解等不报错 -->
+                <version>${dubbo.version}</version>
+            </dependency>
             <dependency>
                 <groupId>cn.iocoder.cloud</groupId>
                 <artifactId>yudao-spring-boot-starter-rpc</artifactId>