Fix different behavior of norm() with axis=None in the array API namespace
Fix different behavior of norm() with axis=None in the array API namespace

pdebuyl/numpy,pdebuyl/numpy,charris/numpy,rgommers/numpy,rgommers/numpy,jakirkham/numpy,seberg/numpy,numpy/numpy,mhvk/numpy,endolith/numpy,charris/numpy,charris/numpy,simongibbons/numpy,pdebuyl/numpy,rgommers/numpy,anntzer/numpy,mattip/numpy,rgommers/numpy,simongibbons/numpy,anntzer/numpy,mhvk/numpy,mhvk/numpy,numpy/numpy,mhvk/numpy,endolith/numpy,numpy/numpy,endolith/numpy,seberg/numpy,anntzer/numpy,jakirkham/numpy,simongibbons/numpy,jakirkham/numpy,numpy/numpy,seberg/numpy,charris/numpy,simongibbons/numpy,mhvk/numpy,anntzer/numpy,jakirkham/numpy,mattip/numpy,mattip/numpy,seberg/numpy,endolith/numpy,pdebuyl/numpy,mattip/numpy,jakirkham/numpy,simongibbons/numpy