S3 upload artifacts (#16336)
S3 upload artifacts (#16336)

* upload to s3 if branch master

* Trigger notification

* catch exception

* remove incorrect echo, remove check for master branch, add branchname to directory,rethrow exception

* update directory structure

yajiedesign/mxnet,eric-haibin-lin/mxnet,tlby/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,sxjscience/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,tlby/mxnet,DickJC123/mxnet,yajiedesign/mxnet,sxjscience/mxnet,sxjscience/mxnet,sxjscience/mxnet,yajiedesign/mxnet,yajiedesign/mxnet,yajiedesign/mxnet,szha/mxnet,szha/mxnet,leezu/mxnet,eric-haibin-lin/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,apache/incubator-mxnet,zhreshold/mxnet,zhreshold/mxnet,szha/mxnet,szha/mxnet,sxjscience/mxnet,ForkedReposBak/mxnet,szha/mxnet,tlby/mxnet,leezu/mxnet,larroy/mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,tlby/mxnet,ForkedReposBak/mxnet,leezu/mxnet,szha/mxnet,yajiedesign/mxnet,sxjscience/mxnet,yajiedesign/mxnet,eric-haibin-lin/mxnet,larroy/mxnet,zhreshold/mxnet,tlby/mxnet,larroy/mxnet,sxjscience/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,szha/mxnet,apache/incubator-mxnet,larroy/mxnet,larroy/mxnet,zhreshold/mxnet,leezu/mxnet,eric-haibin-lin/mxnet,eric-haibin-lin/mxnet,leezu/mxnet,DickJC123/mxnet,larroy/mxnet,ForkedReposBak/mxnet,leezu/mxnet,tlby/mxnet,tlby/mxnet,ForkedReposBak/mxnet,DickJC123/mxnet,tlby/mxnet,yajiedesign/mxnet,zhreshold/mxnet,tlby/mxnet,leezu/mxnet,ForkedReposBak/mxnet,leezu/mxnet,zhreshold/mxnet,zhreshold/mxnet,szha/mxnet,szha/mxnet,DickJC123/mxnet,leezu/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,larroy/mxnet,tlby/mxnet,sxjscience/mxnet,ForkedReposBak/mxnet,apache/incubator-mxnet,apache/incubator-mxnet,ForkedReposBak/mxnet