MAINT: use PyErr_SetString in _import_array where possible
MAINT: use PyErr_SetString in _import_array where possible

Update error messages in _import_array to avoid format string
processing when not needed by the error message text.

mhvk/numpy,rgommers/numpy,endolith/numpy,pdebuyl/numpy,numpy/numpy,mattip/numpy,pdebuyl/numpy,endolith/numpy,charris/numpy,anntzer/numpy,mhvk/numpy,endolith/numpy,mattip/numpy,numpy/numpy,numpy/numpy,anntzer/numpy,pdebuyl/numpy,mattip/numpy,charris/numpy,mhvk/numpy,charris/numpy,rgommers/numpy,mhvk/numpy,charris/numpy,pdebuyl/numpy,anntzer/numpy,numpy/numpy,rgommers/numpy,rgommers/numpy,mhvk/numpy,anntzer/numpy,mattip/numpy,endolith/numpy