Moved commit "ydb_federated_topic: Move fds_mock to separate directory" from ydb repo

Author: qyryq

src/client/federated_topic/ut/basic_usage_ut.cpp

@@ -10,7 +10,7 @@
 #include <ydb/public/sdk/cpp/client/ydb_persqueue_public/include/write_session.h>
 
 #include <ydb/public/sdk/cpp/client/ydb_persqueue_public/ut/ut_utils/ut_utils.h>
-#include <ydb/public/sdk/cpp/client/ydb_federated_topic/ut/fds_mock.h>
+#include <ydb/public/sdk/cpp/client/ydb_federated_topic/ut/fds_mock/fds_mock.h>
 
 #include <library/cpp/testing/unittest/registar.h>
 #include <library/cpp/testing/unittest/tests_data.h>