[Feature] please support scala to write UDF function

[zhangguichuan]

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Description

I am using doris 1.2.1, short commit is 45a8cee, currently we are trying to use scala develop UDF/UDAF in doris, and found underlying doris UDF/UDAF framework only support java, please support scala either

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Are you willing to submit PR?

• Yes I am willing to submit a PR!

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[WencongLiu]

@zhangguichuan do you have the needs to write udf with Python？