MDEV-35510 ASAN build crashes during bootstrap

Avoid ASAN failure by collecting statistics from Result objects
before cleaning them up.  In related single-table cases, statistics
are maintained directly by the single-table update and delete
functions.

sql/sql_cmd.h

@@ -20,6 +20,8 @@
 #ifndef SQL_CMD_INCLUDED
 #define SQL_CMD_INCLUDED
 
+#include <my_base.h>
+
 /*
   When a command is added here, be sure it's also added in mysqld.cc
   in "struct show_var_st status_vars[]= {" ...
@@ -225,6 +227,11 @@ public:
   */
   virtual bool is_dml() const { return false; }
 
+  virtual void get_dml_stat (ha_rows &found, ha_rows &changed)
+  {
+    found= changed= 0;
+  }
+
   /**
     @brief Unprepare prepared statement for the command
     @param thd global context of the processed statement