Since the TiDB add new column operation does not actually write the new column data, it simply logs it to `origin_default_value`.
In disaggregated mode, the default value may be read using tipb passing the default value. The original logic is to pass the default value of tipb to the default value of ColumnInfo (calling defaultValueToField).

After obtaining the default value of tipb, decode it, and then use the defaultValueToField value for processing.

tidb> set session tidb_isolation_read_engines='tiflash';
tidb> select col1, col2, col3, col4, col5, col6, col7, col8, col9, col10, col11, col12, col13, col14, hex(col15) from test.t;

+------+------+------+------+------+-------+------+------+------+-------+-------+-------+----------+----------+-------+
| col1 | col2 | col3 | col4 | col5 | col6  | col7 | col8 | col9 | col10 | col11 | col12 | col13    | col14    |col15 |
+------+------+------+------+------+-------+------+------+------+-------+-------+-------+----------+----------+-------+
|    0 | 0000 | 0.00 | 0.00 |    0 | sss | NULL | NULL | 0000 |       |       | NULL  | 00:00:00 | 00:00:00 | NULL  |
|    0 | 0000 | 0.00 | 0.00 |    0 | sss | NULL | NULL | 0000 |       |       | NULL  | 00:00:00 | 00:00:00 | NULL  |
|    0 | 0000 | 0.00 | 0.00 |    0 | sss | NULL | NULL | 0000 |       |       | NULL  | 00:00:00 | 00:00:00 | NULL  |
+------+------+------+------+------+-------+------+------+------+-------+-------+-------+----------+----------+-------+

+------+------+------+------+------+------+---------------------+---------------------+------+--------+--------+---------------------+----------+-------+------------+
| col1 | col2 | col3 | col4 | col5 | col6 | col7                | col8                | col9 | col10  | col11  | col12               | col13    | col14 | hex(col15) |
+------+------+------+------+------+------+---------------------+---------------------+------+--------+--------+---------------------+----------+-------+------------+
|   30 | 0000 | 0.00 | 1.23 |  123 | sss  | 2017-02-11 00:00:00 | 2018-11-04 23:12:03 | 2012 | value3 | value1 | 2018-11-04 23:12:03 | 12:18:30 | NULL  | 10203      |
|   30 | 0000 | 0.00 | 1.23 |  123 | sss  | 2017-02-11 00:00:00 | 2018-11-04 23:12:03 | 2012 | value3 | value1 | 2018-11-04 23:12:03 | 12:18:30 | NULL  | 10203      |
|   30 | 0000 | 0.00 | 1.23 |  123 | sss  | 2017-02-11 00:00:00 | 2018-11-04 23:12:03 | 2012 | value3 | value1 | 2018-11-04 23:12:03 | 12:18:30 | NULL  | 10203      |
+------+------+------+------+------+------+---------------------+---------------------+------+--------+--------+---------------------+----------+-------+------------+

Fix the bug that in the disaggregated storage and compute architecture, the query result of added column is not correct