Same query results are inconsistent on TiKV and TiFlash when using cast(BLOB AS DECIMAL).

## Bug Report

Please answer these questions before submitting your issue. Thanks!

### 1. Minimal reproduce step (Required)
prepare data
```sql
DROP table if exists t0;
CREATE TABLE t0(c0 BLOB(409) NOT NULL , c1 BOOL UNSIGNED UNIQUE , c2 BLOB(46) );
INSERT IGNORE INTO t0(c0, c2) VALUES (NULL, '\r2');
ALTER TABLE t0 SET TIFLASH REPLICA 1;
```
execute query
```sql
SELECT /*+ read_from_storage(tikv[t0]) */ * FROM t0 WHERE CAST(t0.c2 AS DECIMAL);
SELECT /*+ read_from_storage(tiflash[t0]) */ * FROM t0 WHERE CAST(t0.c2 AS DECIMAL);
```

### 2. What did you expect to see? (Required)
The results of the two queries are equal.

### 3. What did you see instead (Required)
Query1 result:
Query2 result:
empty
### 4. What is your TiDB version? (Required)

Release Version: v8.4.0
Edition: Community
Git Commit Hash: 1a9f0fa25580907d3266dc3edf000ba24379a600
Git Branch: HEAD
UTC Build Time: 2024-11-07 15:18:43
GoVersion: go1.23.2
Race Enabled: false
Check Table Before Drop: false
Store: tikv