[CH] The substring function is inconsistent with the Spark result

### Backend

CH (ClickHouse)

### Bug description

SQL:select i, substring('Spark', 1, i) from range(-10, 10) t(i) where i = -3;
Spark SQL（disable native） results：

Enable native results：：

problem analysis：
Spark Function: substring
substring(str, pos[, len]) - Returns the substring of `str` that starts at `pos` and is of length `len`, or the slice of byte array that starts at `pos` and is of length `len`.

if `len` is less or equal than 0 the result is an empty string

### Spark version

Spark-3.3.x

### Spark configurations

_No response_

### System information

_No response_

### Relevant logs

_No response_

Start by running the reported SQL query against the ClickHouse backend and comparing its native result with Spark SQL 3.3.x. Trace the substring implementation or execution entry point used by this query; done means a non-positive length returns an empty string and the native result matches Spark.

Written by the indexing model from the issue text.