MAINT: Cleanup 'tools/download-wheels.py' (#16329)
MAINT: Cleanup 'tools/download-wheels.py' (#16329)

* ENH: Create download dir if not present for download-wheels

* TST: Add tests for download-wheels

* MAINT: use exist_ok=True for os.makedirs in download-wheels

Co-authored-by: Ross Barnowski <e9fb290bfd0a4406872fd6103425d9efafcfa051@berkeley.edu>

* MAINT: Remove test for download_wheels

* MAINT: Remove directory creation and error if dir not present

* MAINT: Print total files download and remove err for 0 search results

Co-authored-by: Ross Barnowski <e9fb290bfd0a4406872fd6103425d9efafcfa051@berkeley.edu>
grlee77/numpy,grlee77/numpy,jakirkham/numpy,charris/numpy,simongibbons/numpy,simongibbons/numpy,grlee77/numpy,pbrod/numpy,mattip/numpy,endolith/numpy,madphysicist/numpy,pbrod/numpy,numpy/numpy,madphysicist/numpy,mhvk/numpy,jakirkham/numpy,madphysicist/numpy,seberg/numpy,simongibbons/numpy,mhvk/numpy,rgommers/numpy,mhvk/numpy,grlee77/numpy,jakirkham/numpy,mhvk/numpy,jakirkham/numpy,grlee77/numpy,anntzer/numpy,pbrod/numpy,charris/numpy,abalkin/numpy,simongibbons/numpy,endolith/numpy,pbrod/numpy,pbrod/numpy,simongibbons/numpy,endolith/numpy,abalkin/numpy,jakirkham/numpy,pdebuyl/numpy,mattip/numpy,madphysicist/numpy,pdebuyl/numpy,anntzer/numpy,mattip/numpy,abalkin/numpy,endolith/numpy,charris/numpy,pdebuyl/numpy,anntzer/numpy,madphysicist/numpy,pdebuyl/numpy,numpy/numpy,rgommers/numpy,mhvk/numpy,rgommers/numpy,rgommers/numpy,anntzer/numpy,mattip/numpy,seberg/numpy,numpy/numpy,seberg/numpy,charris/numpy,numpy/numpy,seberg/numpy