[I] [Feature][SDK] Transform support GREATEST() and LEAST() function [inlong]

["emptyOVO (via GitHub)" <gi...@apache.org>]

emptyOVO opened a new issue, #11220:
URL: https://github.com/apache/inlong/issues/11220

   ### Description
   
   * parent issue: #10796
   * from flinksql: https://nightlies.apache.org/flink/flink-docs-master/docs/dev/table/functions/systemfunctions/#string-functions
   * GREATEST(value1[, value2]*)--Returns the greatest value of the list of arguments. Returns NULL if any argument is NULL.
   * LEAST(value1[, value2]*)--Returns the least value of the list of arguments. Returns NULL if any argument is NULL.
   
   ### Use case
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [X] Yes, I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)
   


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