Regression: no longer support the `substring` function

[jonahgao]

Describe the bug

Found while working on #10013.

An error was reported stating, This feature is not implemented: Unsupported ast node in sqltorel: Substring.
It worked prior to #10137, but it stopped working after upgrading sqlparser to 0.45.0.

Related to apache/datafusion-sqlparser-rs#1173

To Reproduce

DataFusion CLI v37.1.0
> select substring('xxxx', 1, 2);
This feature is not implemented: Unsupported ast node in sqltorel: Substring { expr: Value(SingleQuotedString("xxxx")), substring_from: Some(Value(Number("1", false))), substring_for: Some(Value(Number("2", false))), special: true }

Expected behavior

No response

Additional context

No response

[jonahgao]

take