[Feature][SDK] Transform SQL supports INSTR function

[Zkplo]

Description

• parent issue [Umbrella] Tencent Rhino-bird: Expand InLong Transform functions #10796
• MySql Official Description: https://dev.mysql.com/doc/refman/8.4/en/string-functions.html#function_instr

INSTR(str,substr): Returns the position of the first occurrence of substring substr in string str.
This is the same as LOCATE(). So just add the instr function name in locateFunction.

Use case

INSTR('foobarbar', 'bar');   -> 4
INSTR('xbar', 'foobar');     -> 0

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

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