tidb_schema_cache_size max support value is wrong

[lilinghai]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

mysql> set @@global.tidb_schema_cache_size=10737418240;
Query OK, 0 rows affected, 1 warning (0.05 sec)

mysql> show warnings;
+---------+------+-----------------------------------------------------------------+
| Level   | Code | Message                                                         |
+---------+------+-----------------------------------------------------------------+
| Warning | 1292 | Truncated incorrect tidb_schema_cache_size value: '10737418240' |
+---------+------+-----------------------------------------------------------------+
1 row in set (0.07 sec)

mysql> select @@global.tidb_schema_cache_size;
+---------------------------------+
| @@global.tidb_schema_cache_size |
+---------------------------------+
| 2147483647                      |
+---------------------------------+
1 row in set (0.06 sec)

2. What did you expect to see? (Required)

The Range is [0, 9223372036854775807] based the dock https://docs.pingcap.com/tidb/dev/system-variables#tidb_schema_cache_size-new-in-v800

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

Release Version: v8.2.0-alpha
Edition: Community
Git Commit Hash: 6cf8776
Git Branch: heads/refs/tags/v8.2.0-alpha
UTC Build Time: 2024-06-13 11:49:48
GoVersion: go1.21.10
Race Enabled: false
Check Table Before Drop: false
Store: tikv