Use $input-border-width for custom file input borders
Use $input-border-width for custom file input borders

Fixes part of #18150

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lemuelbarango/bootstrap,Lyricalz/bootstrap,bardiharborow/bootstrap,andresgalante/bootstrap,fschumann1211/bootstrap,SweetProcess/bootstrap,kvlsrg/bootstrap,andresgalante/bootstrap,copperdesign/bootstrap,joblocal/bootstrap,Delagen/bootstrap,Hemphill/bootstrap-docs,mpharrigan/bootstrap,david-schopf/bootstrap,creativewebjp/bootstrap,david-schopf/bootstrap,wesamco/bootstrap-rtl,janseliger/bootstrap,realcrowd/bootstrap,stanwmusic/bootstrap,mpharrigan/bootstrap,igoynawamreh/bootstrap,supergibbs/bootstrap,Scoutski/bootstrap,GerHobbelt/bootstrap,sealocal/bootstrap,frostbitten/bootstrap,vsn4ik/bootstrap,onenameio/rhythm-bootstrap,lipis/bootstrap,sealocal/bootstrap,blockstack/blockstack-bootstrap,yuyokk/bootstrap,abvalentine/bootstrap,igoynawamreh/bootstrap,tjkohli/bootstrap,bardiharborow/bootstrap,Hightrack/bootstrap,bardiharborow/bootstrap,bootstrapbrasil/bootstrap,9-chirno/chirno,realcrowd/bootstrap,fschumann1211/bootstrap,urbit/bootstrap,zalog/bootstrap,johnajacob/bootstrap,n054/bootstrap,copperdesign/bootstrap,Scoutski/bootstrap,andresgalante/bootstrap,Delagen/bootstrap,gijsbotje/bootstrap,stanwmusic/bootstrap,blockstack/blockstack-bootstrap,wesamco/bootstrap-rtl,SweetProcess/bootstrap,lipis/bootstrap,IdanCo/bootstrap,seanwu99/bootstrap,m5o/bootstrap,tibo66/bootstrap,nice-fungal/bootstrap,creativewebjp/bootstrap,xt0rted/bootstrap,Lyricalz/bootstrap,johnajacob/bootstrap,jipexu/bootstrap,afuno/bootstrap,GerHobbelt/bootstrap,slavanga/bootstrap,hebbet/bootstrap,Hightrack/bootstrap,abvalentine/bootstrap,jipexu/bootstrap,Lyricalz/bootstrap,slavanga/bootstrap,fschumann1211/bootstrap,tibo66/bootstrap,nice-fungal/bootstrap,abvalentine/bootstrap,Delagen/bootstrap,NCARB/bootstrap,tagliala/bootstrap,gijsbotje/bootstrap,vitaligent/4,GerHobbelt/bootstrap,wesamco/bootstrap-rtl,m5o/bootstrap,twbs/bootstrap,TheFridayInstitute/bootstrap,vsn4ik/bootstrap,davethegr8/bootstrap,supergibbs/bootstrap,johnajacob/bootstrap,tagliala/bootstrap,Hemphill/bootstrap-docs,IdanCo/bootstrap,JumpLinkNetwork/bootstrap-backward,n054/bootstrap,urbit/bootstrap,tagliala/bootstrap,davethegr8/bootstrap,JumpLinkNetwork/bootstrap-backward,afuno/bootstrap,lemuelbarango/bootstrap,janseliger/bootstrap,lemuelbarango/bootstrap,urbit/bootstrap,NCARB/bootstrap,hellonewman81/bs4,zalog/bootstrap,Scoutski/bootstrap,mpharrigan/bootstrap,edanbarak/bootstrap,twbs/bootstrap,afuno/bootstrap,stanwmusic/bootstrap,realcrowd/bootstrap,lipis/bootstrap,lipis/bootstrap,SweetProcess/bootstrap,xt0rted/bootstrap,Hightrack/bootstrap,zalog/bootstrap,inway/bootstrap,yuyokk/bootstrap,tjkohli/bootstrap,frostbitten/bootstrap,igoynawamreh/bootstrap,gijsbotje/bootstrap,SweetProcess/bootstrap,creativewebjp/bootstrap,Scoutski/bootstrap,joblocal/bootstrap,vsn4ik/bootstrap,tibo66/bootstrap,joblocal/bootstrap,frostbitten/bootstrap,n054/bootstrap,edanbarak/bootstrap,TheFridayInstitute/bootstrap,seanwu99/bootstrap,xt0rted/bootstrap,andresgalante/bootstrap,edanbarak/bootstrap,onenameio/rhythm-bootstrap,hellonewman81/bs4,blockstack/blockstack-bootstrap,joblocal/bootstrap,creativewebjp/bootstrap,peterblazejewicz/bootstrap,fschumann1211/bootstrap,abvalentine/bootstrap,NCARB/bootstrap,realcrowd/bootstrap,seanwu99/bootstrap,onenameio/rhythm-bootstrap,kvlsrg/bootstrap,9-chirno/chirno,davethegr8/bootstrap,edanbarak/bootstrap,IdanCo/bootstrap,tomlutzenberger/bootstrap,inway/bootstrap,lemuelbarango/bootstrap,vsn4ik/bootstrap,tibo66/bootstrap,slavanga/bootstrap,peterblazejewicz/bootstrap,JumpLinkNetwork/bootstrap-backward,hebbet/bootstrap,Hemphill/bootstrap-docs,Lyricalz/bootstrap,coliff/bootstrap,peterblazejewicz/bootstrap,david-schopf/bootstrap,NCARB/bootstrap,janseliger/bootstrap,gijsbotje/bootstrap,afuno/bootstrap,vitaligent/4,copperdesign/bootstrap,bootstrapbrasil/bootstrap,sealocal/bootstrap,inway/bootstrap,tomlutzenberger/bootstrap,slavanga/bootstrap,yuyokk/bootstrap,stanwmusic/bootstrap,bootstrapbrasil/bootstrap,9-chirno/chirno,TheFridayInstitute/bootstrap,igoynawamreh/bootstrap,bardiharborow/bootstrap,9-chirno/chirno,Delagen/bootstrap,kvlsrg/bootstrap,nice-fungal/bootstrap,coliff/bootstrap,TheFridayInstitute/bootstrap,tomlutzenberger/bootstrap,sealocal/bootstrap,yuyokk/bootstrap,supergibbs/bootstrap,IdanCo/bootstrap,davethegr8/bootstrap,hellonewman81/bs4,copperdesign/bootstrap,Hemphill/bootstrap-docs,seanwu99/bootstrap,JumpLinkNetwork/bootstrap-backward,johnajacob/bootstrap,wesamco/bootstrap-rtl,jipexu/bootstrap,vitaligent/4,jipexu/bootstrap,n054/bootstrap,supergibbs/bootstrap,janseliger/bootstrap,xt0rted/bootstrap,hebbet/bootstrap,hebbet/bootstrap,frostbitten/bootstrap