* tmp gather vjp

* support gather

* remove useless code

* fix compiling error

* fix ut

* add eager test

* add eager test

* add seed

* small change

* fix cpu error

* fix transpose op compat

* remove tensor index case

* fix prim_cinn

* small commit

* add cumsum prim backward

* small commit

* skip aixs=None test case

* fix op generante eror

* fix static test error

* remove unused code

* fix static test error

* small commit

* skip cpu float16 test case

* skip eager cpu cumsum float16 test case

* add eager and static UT

* fix ut

* add composite backward rule

* fix error

* fix type error and format error

* add try cpu+float16 test

* fix test bugs

* remove test for cpu+float16 and make y[0] be the grad arg

* add cinn test

* fix UT

* fix the wrong dim of v in test cases

* change y[0] to y[1] for grad in UT

* reshape flatten out

* Disable cinn single test

* use scatter_nd_add

* modify the reshape part of topk_grad

* delete useless build file

* to make the syntax right

* modify bug

* try use of put_along_axis

* remove cinn test

* reformat todo

* add silu composite rule

* fix code style.

* add cinn test

* fix composite grad maker code gen

* add prim in cumsum op test

* remove old test

* fix typro

* pass the static test

* fix typro

* modify optest and delete old test files

* remove normal test_top_k_op test

* fix typro

* pass axis=None test case

* buffer comment

* for debug

* add silu fp16 unit test.

* add static guard

* remove forward prim test

* remove same name axis

* modify the test_top_v2_op.py to pass all local tests

* delete the useless testcase

* fix mistake

* add more testcases to test dtype16 and dtype32

---------
Co-authored-by: NJiabinYang <360788950@qq.com>
Co-authored-by: NGGBond8488 <857631483@qq.com>
Co-authored-by: Nzxcd <228587199@qq.com>
Co-authored-by: NCharles-hit <wanghao107@baidu.com>