Cannot use RESOURCE_GROUP Optimizer hint in sql binding statement

## Bug Report

I cannot use RESOURCE_GROUP Optimizer hint in sql binding statement for limit the ttl job’s resource.

### 1. Minimal reproduce step (Required)

```
CREATE GLOBAL BINDING FOR
SELECT LOW_PRIORITY SQL_NO_CACHE `id`, `created_at`
FROM `test`.`olaptest1`
WHERE `created_at` < FROM_UNIXTIME(?)
ORDER BY `id`, `created_at` ASC
LIMIT ?
USING
SELECT /*+ RESOURCE_GROUP(rg_low_background) */ LOW_PRIORITY SQL_NO_CACHE `id`, `created_at`
FROM `test`.`olaptest1`
WHERE `created_at` < FROM_UNIXTIME(?)
ORDER BY `id`, `created_at` ASC
LIMIT ?
;
ERROR 8066 (HY000): Optimizer hint can only be followed by certain keywords like SELECT, INSERT, etc.
```

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

### 3. What did you see instead (Required)
ERROR 8066 (HY000): Optimizer hint can only be followed by certain keywords like SELECT, INSERT, etc.

### 4. What is your TiDB version? (Required)

v7.5.4