BLD: fix confusing "import pip" failure that should be caught (#14665)
BLD: fix confusing "import pip" failure that should be caught (#14665)

Observed in the traceback of gh-14647. Not the root cause of that
build issue, it's just confusing.
vigna/scipy,ilayn/scipy,zerothi/scipy,anntzer/scipy,tylerjereddy/scipy,mdhaber/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,grlee77/scipy,anntzer/scipy,scipy/scipy,rgommers/scipy,rgommers/scipy,matthew-brett/scipy,vigna/scipy,grlee77/scipy,anntzer/scipy,Stefan-Endres/scipy,andyfaff/scipy,perimosocordiae/scipy,zerothi/scipy,endolith/scipy,scipy/scipy,rgommers/scipy,matthew-brett/scipy,ilayn/scipy,WarrenWeckesser/scipy,Stefan-Endres/scipy,mdhaber/scipy,anntzer/scipy,tylerjereddy/scipy,perimosocordiae/scipy,andyfaff/scipy,zerothi/scipy,matthew-brett/scipy,scipy/scipy,Stefan-Endres/scipy,anntzer/scipy,ilayn/scipy,andyfaff/scipy,mdhaber/scipy,mdhaber/scipy,endolith/scipy,ilayn/scipy,rgommers/scipy,grlee77/scipy,tylerjereddy/scipy,andyfaff/scipy,endolith/scipy,perimosocordiae/scipy,perimosocordiae/scipy,ilayn/scipy,matthew-brett/scipy,matthew-brett/scipy,scipy/scipy,scipy/scipy,andyfaff/scipy,zerothi/scipy,grlee77/scipy,anntzer/scipy,Stefan-Endres/scipy,grlee77/scipy,endolith/scipy,zerothi/scipy,WarrenWeckesser/scipy,mdhaber/scipy,andyfaff/scipy,scipy/scipy,ilayn/scipy,Stefan-Endres/scipy,endolith/scipy,zerothi/scipy,mdhaber/scipy,rgommers/scipy,vigna/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,tylerjereddy/scipy,vigna/scipy,WarrenWeckesser/scipy,endolith/scipy,WarrenWeckesser/scipy,tylerjereddy/scipy,vigna/scipy,WarrenWeckesser/scipy