feat:implement sql style 'substr_index' string function

[Syleechan]

Which issue does this PR close?

Closes #.

Rationale for this change

https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_substring-index:~:text=SUBSTRING_INDEX(str%2Cdelim%2Ccount)
In calcite, the function expression name is substr_index

What changes are included in this PR?

Are these changes tested?

Are there any user-facing changes?

[comphead]

awesome, can we also have the same tests with empty strings as input and search token?

[Syleechan]

add empty string tests and 0 count tests

[comphead]

we need to add a defense check args is exactly 3 elements

[Syleechan]

thanks, I add the args len check

[comphead]

Thanks @Syleechan please take a look into minor comments

[Ted-Jiang]

LGTM 👍 , and tested below in mysql, maybe add them is better
SELECT SUBSTRING_INDEX('www.mysql.com', '.', 4); -> www.mysql.com SELECT SUBSTRING_INDEX('www.mysql.com', '.', 0); ->

[Syleechan]

LGTM 👍 , and tested below in mysql, maybe add them is better SELECT SUBSTRING_INDEX('www.mysql.com', '.', 4); -> www.mysql.com SELECT SUBSTRING_INDEX('www.mysql.com', '.', 0); ->

just the same as SELECT substr_index('www.apache.org', 'ac', 2)

[comphead]

please use internal_err! macros

[Syleechan]

thanks, change to internal_err.

[comphead]

Thanks @Syleechan , we are very close, please address the minor to use error macros, it gives a possibility to backtrace the error

[Syleechan]

@alamb please help to merge if there are no other concerns, thanks.

[comphead]

lgtm thanks @Syleechan

[alamb]

Thanks @Syleechan as well as @comphead and @Ted-Jiang for the review

Since @Ted-Jiang is a committer as well, in the future please feel free to merge PRs once they have been reviewed and follow https://arrow.apache.org/datafusion/contributor-guide/index.html#pull-request-overview (as this one has)