[Feature][SDK] Transform SQL support sign function

[Zkplo]

Description

• parent issue [Umbrella] Tencent Rhino-bird: Expand InLong Transform functions #10796

sign(x): Return the sign of x, where x is a negative number, 0, and positive numbers return -1, 0, and 1, respectively

Use case

No response

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

[aloyszhang]

Hi, @Zkplo
FYI, if there is something wrong with your branch, you can rebase the master again and force push to your branch. It does not need to open a brand-new pull request.

You can try this way next time if you meet the same problem again.