Fix flaky test test_operator.test_binary_op due to numerical errors (#11259)
Fix flaky test test_operator.test_binary_op due to numerical errors (#11259)

Use float64 computations as the reference numpy implementation operates in double and not float.
f64(f32(f64(.))) % f64(f32(f64(.))) is not the same as f64(.) % f64(.) due to limited precission.

fixes #9853
navrasio/mxnet,tlby/mxnet,mbaijal/incubator-mxnet,rahul003/mxnet,jamesliu/mxnet,leezu/mxnet,navrasio/mxnet,leezu/mxnet,navrasio/mxnet,zhreshold/mxnet,reminisce/mxnet,jamesliu/mxnet,zhreshold/mxnet,tlby/mxnet,ptrendx/mxnet,larroy/mxnet,leezu/mxnet,rahul003/mxnet,eric-haibin-lin/mxnet,indhub/mxnet,reminisce/mxnet,zhreshold/mxnet,mbaijal/incubator-mxnet,jamesliu/mxnet,leezu/mxnet,yajiedesign/mxnet,zhreshold/mxnet,indhub/mxnet,sxjscience/mxnet,sxjscience/mxnet,mbaijal/incubator-mxnet,ptrendx/mxnet,dmlc/mxnet,sxjscience/mxnet,reminisce/mxnet,zhreshold/mxnet,ptrendx/mxnet,navrasio/mxnet,ForkedReposBak/mxnet,dmlc/mxnet,reminisce/mxnet,yajiedesign/mxnet,ptrendx/mxnet,ForkedReposBak/mxnet,precedenceguo/mxnet,rahul003/mxnet,indhub/mxnet,navrasio/mxnet,indhub/mxnet,sxjscience/mxnet,tlby/mxnet,szha/mxnet,ForkedReposBak/mxnet,navrasio/mxnet,eric-haibin-lin/mxnet,indhub/mxnet,tlby/mxnet,tlby/mxnet,mbaijal/incubator-mxnet,dmlc/mxnet,ptrendx/mxnet,leezu/mxnet,rahul003/mxnet,szha/mxnet,eric-haibin-lin/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,larroy/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,apache/incubator-mxnet,zhreshold/mxnet,szha/mxnet,mbaijal/incubator-mxnet,tlby/mxnet,ptrendx/mxnet,navrasio/mxnet,DickJC123/mxnet,precedenceguo/mxnet,precedenceguo/mxnet,indhub/mxnet,yajiedesign/mxnet,sxjscience/mxnet,leezu/mxnet,sxjscience/mxnet,jamesliu/mxnet,apache/incubator-mxnet,yajiedesign/mxnet,szha/mxnet,eric-haibin-lin/mxnet,indhub/mxnet,larroy/mxnet,larroy/mxnet,ptrendx/mxnet,jamesliu/mxnet,precedenceguo/mxnet,indhub/mxnet,yajiedesign/mxnet,rahul003/mxnet,szha/mxnet,szha/mxnet,precedenceguo/mxnet,reminisce/mxnet,zhreshold/mxnet,szha/mxnet,dmlc/mxnet,ptrendx/mxnet,reminisce/mxnet,mbaijal/incubator-mxnet,navrasio/mxnet,ptrendx/mxnet,tlby/mxnet,DickJC123/mxnet,larroy/mxnet,dmlc/mxnet,dmlc/mxnet,szha/mxnet,mbaijal/incubator-mxnet,apache/incubator-mxnet,yajiedesign/mxnet,dmlc/mxnet,reminisce/mxnet,jamesliu/mxnet,reminisce/mxnet,larroy/mxnet,apache/incubator-mxnet,tlby/mxnet,leezu/mxnet,navrasio/mxnet,mbaijal/incubator-mxnet,sxjscience/mxnet,ForkedReposBak/mxnet,eric-haibin-lin/mxnet,larroy/mxnet,larroy/mxnet,szha/mxnet,ForkedReposBak/mxnet,rahul003/mxnet,DickJC123/mxnet,precedenceguo/mxnet,mbaijal/incubator-mxnet,eric-haibin-lin/mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,eric-haibin-lin/mxnet,reminisce/mxnet,indhub/mxnet,ptrendx/mxnet,eric-haibin-lin/mxnet,leezu/mxnet,tlby/mxnet,DickJC123/mxnet,rahul003/mxnet,yajiedesign/mxnet,precedenceguo/mxnet,tlby/mxnet,reminisce/mxnet,dmlc/mxnet,yajiedesign/mxnet,precedenceguo/mxnet,jamesliu/mxnet,jamesliu/mxnet,rahul003/mxnet,zhreshold/mxnet,zhreshold/mxnet,jamesliu/mxnet,ForkedReposBak/mxnet,dmlc/mxnet,precedenceguo/mxnet,sxjscience/mxnet,rahul003/mxnet,leezu/mxnet,ForkedReposBak/mxnet