fix bug spring.cloud.nacos.config.enabled not work (#3908)

Author: shiyiyue1102

spring-cloud-alibaba-starters/spring-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/configdata/NacosConfigDataLocationResolver.java

@@ -124,7 +124,7 @@ public boolean isResolvable(ConfigDataLocationResolverContext context,
 		String prefix = NacosPropertiesPrefixer.getPrefix(context.getBinder());
 
 		return context.getBinder()
-				.bind(prefix + "config.enabled", Boolean.class)
+				.bind(prefix + ".config.enabled", Boolean.class)
 				.orElse(true);
 	}
 

spring-cloud-alibaba-starters/spring-alibaba-nacos-config/src/test/java/com.alibaba.cloud.nacos/configdata/NacosConfigDataLocationResolverTest.java

@@ -89,7 +89,7 @@ void testIsResolvable_givenDisable_thenReturnFalse() {
 
 		String prefix = NacosPropertiesPrefixer.getPrefix(environment);
 
-		this.environment.setProperty(prefix + "config.enabled", "false");
+		this.environment.setProperty(prefix + ".config.enabled", "false");
 		assertThat(
 				this.resolver.isResolvable(this.context, ConfigDataLocation.of("nacos:")))
 						.isFalse();