[FEAT MERGE] Merge syslog user experience improvement to master

Co-authored-by: Charles0429 <xiezhenjiang@gmail.com>
Co-authored-by: tino247 <tino247@126.com>
Co-authored-by: chaser-ch <chaser.ch@antgroup.com>

deps/oblib/unittest/lib/test_fixed_array.cpp

@@ -186,6 +186,7 @@ TEST(ObTestFiexedArray, serialize3)
 }
 TEST(ObTestFiexedArray, other)
 {
+  int ret = 0;
   ObArray<int> tmp_array;
   Testfun testfun(tmp_array);
   OB_LOG(WARN, "return size", K(sizeof(testfun)), K(sizeof(Testfun)));