BENCH: optimize: added linprog presolve benchmarks (#11372)
BENCH: optimize: added linprog presolve benchmarks (#11372)

* BENCH: optimize: added linprog presolve benchmarks

* BENCH: optimize: os.join paths in Netlib benchmarks

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