fix(接口测试): 修复mock保存30M数据报错的缺陷

--bug=1033139 --user=王孝刚 【接口测试】github#27662，接口Mock 数据超过30M, 保存报错，接口500 https://www.tapd.cn/55049933/s/1446500

framework/sdk-parent/sdk/src/main/java/io/metersphere/autoconfigure/RestTemplateConfig.java

@@ -1,8 +1,10 @@
 package io.metersphere.autoconfigure;
 
 
+import com.fasterxml.jackson.core.StreamReadConstraints;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import io.metersphere.commons.utils.JSON;
 import io.metersphere.commons.utils.LogUtil;
 import io.metersphere.utils.LoggerUtil;
 import org.apache.hc.client5.http.ConnectTimeoutException;
@@ -81,6 +83,8 @@ public class RestTemplateConfig {
     @Bean
     public ObjectMapper objectMapper() {
         ObjectMapper mapper = new ObjectMapper();
+        mapper.getFactory()
+                .setStreamReadConstraints(StreamReadConstraints.builder().maxStringLength(JSON.DEFAULT_MAX_STRING_LEN).build());
         mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
         return mapper;
     }