* make Numpy version is below 1.19.3

* fix 2.0 doc

also fix `no_grad` alias

* skip_layernorm_op done

* add unittest

* slice op convertor support trt < 6

* skip_layernorm only work in ernie

As the title

fix the add_n english doc

* upgrade pass capability

* add monitoring for executive ut at night

* fix some error for paddle_build.bat

* fix some error

* fix some error in windows

* fix some error on windows

1. Remove 'fluid';
2. Variable -> Tensor

APIs:
 sum, convert_call, convert_ifelse,
 convert_logical_and, convert_logical_or, convert_logical_not

Modify ProgramTranslator and TracedLayer Doc for API 2.0

* paddle-trt support mul channelwise quant

* add support for depthwise_conv2d

* add errmsg for unsupported op type

Remove "fluid", "variable" in 2.0 API doc

As the title

* fix ut exec timeout notest,test=kunlun

* fix error for executing ut timeout,test=document_fix

* modified timeout value on windows

* fix some error

* clear clcache cache file and reopen clcache, test=develop

* reopen clcache, test=develop

* exec ut no more than 15s 2

* fix for ut test_inplace_addto_strategy timeout