Fix shape-related issues in FuseConv (#12410)
* fix shape mismatch in FuseConv
* remove zeroed bias
* offset Z dim
* append UT
* add testing model
* remove output
* remove commented
* fix comments
* refactor output msg
* narrowly restrict the use of cudnn...ActFwd
* reset changes in cudnn_common
* add test cases covering all path
* move cases to conv test
* remove extra space
* fix build err
Co-authored-by: Randy Shuai <rashuai@microsoft.com>
