Simplify TABLE::decide_logging_format()

- Use local variables table and share to simplify code
- Use sql_command_flags to detect what kind of command was used
- Added CF_DELETES_DATA to simplify detecton of delete commands
- Removed duplicate error in create_table_from_items().

sql/sql_class.h

@@ -6336,6 +6336,11 @@ public:
 
 /* Bits in server_command_flags */
 
+/**
+  Statement that deletes existing rows (DELETE, DELETE_MULTI)
+*/
+#define CF_DELETES_DATA (1U << 24)
+
 /**
   Skip the increase of the global query id counter. Commonly set for
   commands that are stateless (won't cause any change on the server