fix: treat change$* as internal columns

[dantengsky]

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Summary

mark stream meta columns change$action, change$is_update, and change$row_id as Internal Columns,

so that test scenario of issue #14062 passes

mysql> create table t (c int);
Query OK, 0 rows affected (0.12 sec)

mysql> create stream s on table t ;
Query OK, 0 rows affected (0.12 sec)

mysql>
mysql> insert into t values(1);
Query OK, 1 row affected (0.14 sec)

mysql>
mysql> select * from s where change$action = 'INSERT';
+------+
| c    |
+------+
|    1 |
+------+
1 row in set (0.09 sec)
Read 1 rows, 133.00 B in 0.038 sec., 26.02 rows/sec., 3.38 KiB/sec.

mysql>
mysql> select * from s where change$is_update = false;
+------+
| c    |
+------+
|    1 |
+------+
1 row in set (0.09 sec)
Read 1 rows, 133.00 B in 0.039 sec., 25.72 rows/sec., 3.34 KiB/sec.

mysql>
mysql> select * from s where change$row_id = '1';
Empty set (0.13 sec)
Read 1 rows, 197.00 B in 0.043 sec., 23.39 rows/sec., 4.50 KiB/sec.

mysql> select *, change$row_id from s
    -> ;
+------+----------------------------------------+
| c    | change$row_id                          |
+------+----------------------------------------+
|    1 | 21cf143922c14704883f5264d09cc84b000000 |
+------+----------------------------------------+
1 row in set (0.12 sec)
Read 1 rows, 197.00 B in 0.037 sec., 26.86 rows/sec., 5.17 KiB/sec.

mysql> select * from s where change$row_id = '21cf143922c14704883f5264d09cc84b000000';
+------+
| c    |
+------+
|    1 |
+------+
1 row in set (0.14 sec)
Read 1 rows, 197.00 B in 0.042 sec., 23.85 rows/sec., 4.59 KiB/sec.

Fixes #14062

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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