DOC: move `import_array` and `import_umath` above `PyModule_Create`
DOC: move `import_array` and `import_umath` above `PyModule_Create`

This seems to be a slightly better order, because these initializations
are independent of module creation, and if initialization fails then
there's no reference to the new module floating around. See
https://github.com/scipy/scipy/issues/16231

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