TST: fix tf2zpk test failure due to incorrect complex sorting.
TST: fix tf2zpk test failure due to incorrect complex sorting.

Closes gh-11041

andyfaff/scipy,andyfaff/scipy,Stefan-Endres/scipy,vigna/scipy,jamestwebber/scipy,vigna/scipy,Eric89GXL/scipy,WarrenWeckesser/scipy,person142/scipy,aeklant/scipy,pizzathief/scipy,matthew-brett/scipy,jamestwebber/scipy,arokem/scipy,Stefan-Endres/scipy,nmayorov/scipy,matthew-brett/scipy,Stefan-Endres/scipy,jamestwebber/scipy,pizzathief/scipy,grlee77/scipy,arokem/scipy,endolith/scipy,mdhaber/scipy,ilayn/scipy,ilayn/scipy,matthew-brett/scipy,aeklant/scipy,tylerjereddy/scipy,tylerjereddy/scipy,scipy/scipy,mdhaber/scipy,arokem/scipy,anntzer/scipy,grlee77/scipy,pizzathief/scipy,person142/scipy,person142/scipy,perimosocordiae/scipy,tylerjereddy/scipy,rgommers/scipy,ilayn/scipy,WarrenWeckesser/scipy,anntzer/scipy,perimosocordiae/scipy,anntzer/scipy,scipy/scipy,aeklant/scipy,rgommers/scipy,anntzer/scipy,tylerjereddy/scipy,zerothi/scipy,person142/scipy,Eric89GXL/scipy,Eric89GXL/scipy,rgommers/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,e-q/scipy,ilayn/scipy,nmayorov/scipy,andyfaff/scipy,nmayorov/scipy,nmayorov/scipy,scipy/scipy,jamestwebber/scipy,zerothi/scipy,WarrenWeckesser/scipy,mdhaber/scipy,anntzer/scipy,ilayn/scipy,andyfaff/scipy,Eric89GXL/scipy,vigna/scipy,mdhaber/scipy,anntzer/scipy,zerothi/scipy,e-q/scipy,Stefan-Endres/scipy,tylerjereddy/scipy,Stefan-Endres/scipy,scipy/scipy,endolith/scipy,endolith/scipy,WarrenWeckesser/scipy,grlee77/scipy,perimosocordiae/scipy,rgommers/scipy,jamestwebber/scipy,perimosocordiae/scipy,andyfaff/scipy,nmayorov/scipy,matthew-brett/scipy,scipy/scipy,zerothi/scipy,zerothi/scipy,vigna/scipy,grlee77/scipy,andyfaff/scipy,scipy/scipy,endolith/scipy,pizzathief/scipy,Eric89GXL/scipy,WarrenWeckesser/scipy,arokem/scipy,Eric89GXL/scipy,ilayn/scipy,grlee77/scipy,perimosocordiae/scipy,person142/scipy,pizzathief/scipy,aeklant/scipy,endolith/scipy,vigna/scipy,mdhaber/scipy,zerothi/scipy,e-q/scipy,e-q/scipy,mdhaber/scipy,matthew-brett/scipy,WarrenWeckesser/scipy,e-q/scipy,rgommers/scipy,arokem/scipy,aeklant/scipy,endolith/scipy