[Feature][SDK] Transform SQL supports "trunc" function

[Zkplo]

Description

• parent issue [Umbrella] Tencent Rhino-bird: Expand InLong Transform functions #10796
• Postgresql Official Description: https://www.postgresql.org/docs/current/functions-math.html

trunc ( double precision ): Truncates to integer (towards zero)
trunc ( v numeric, s integer ) : Truncates v to s decimal places

Use case

trunc(42.8) → 42
trunc(-42.8) → -42
trunc(42.4382, 2) → 42.43

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct