[opt](s3client) Set ClientConfiguration.requestTimeoutMs default value from 3000ms to 30000ms (#49315)

* ClientConfiguration.requestTimeoutMs default is 3000ms in
`aws-sdk-cpp`, this should be more than adequate for most services.
However, we meet problem when cloud provider's storage service or
network not stable

* refer to
https://github.com/aws/aws-sdk-cpp/blob/main/src/aws-cpp-sdk-core/include/aws/core/client/ClientConfiguration.h

Author: swjtu-zhanglei

be/src/util/s3_util.cpp

@@ -297,9 +297,11 @@ std::shared_ptr<io::ObjStorageClient> S3ClientFactory::_create_s3_client(
 #endif
     }
 
+    aws_config.requestTimeoutMs = 30000;
     if (s3_conf.request_timeout_ms > 0) {
         aws_config.requestTimeoutMs = s3_conf.request_timeout_ms;
     }
+
     if (s3_conf.connect_timeout_ms > 0) {
         aws_config.connectTimeoutMs = s3_conf.connect_timeout_ms;
     }