【PaddlePaddle Hackathon 3】Add Paddle elementwise_mod operator

[Asthestarsfalll]

Details:

add elementwise_mod operation in Paddle front end

Reference:

https://www.paddlepaddle.org.cn/documentation/docs/en/1.8/api/layers/elementwise_mod.html

uni-test passed

[Asthestarsfalll]

Maybe we should test more different data type and merge those redundant test functions into one?

[yuxu42]

@meiyang-intel Could you please take a review? Thanks!

[Asthestarsfalll]

@meiyang-intel Could you please take a review? Thanks!

[Asthestarsfalll]

Is there anything I need to do? The ci/jenkins failed, but I can not get detail infomation.