Auto merge of #10619 - perlun:add-update-cargo-all-packages-warning, r=Wafflespeanut
Auto merge of #10619 - perlun:add-update-cargo-all-packages-warning, r=Wafflespeanut

mach: Added warning for update-cargo -a

To quote Lars Bergstrom:

> yeah, that's a giant footgun :-)

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CJ8664/servo,mattnenterprise/servo,avadacatavra/servo,saneyuki/servo,canaltinova/servo,paulrouget/servo,nrc/servo,emilio/servo,paulrouget/servo,dsandeephegde/servo,CJ8664/servo,jimberlage/servo,DominoTree/servo,dati91/servo,nrc/servo,mattnenterprise/servo,emilio/servo,dsandeephegde/servo,nnethercote/servo,DominoTree/servo,eddyb/servo,peterjoel/servo,jimberlage/servo,saneyuki/servo,KiChjang/servo,dati91/servo,CJ8664/servo,jimberlage/servo,ConnorGBrewster/servo,larsbergstrom/servo,CJ8664/servo,cbrewster/servo,splav/servo,saneyuki/servo,DominoTree/servo,DominoTree/servo,eddyb/servo,eddyb/servo,notriddle/servo,sadmansk/servo,nrc/servo,sadmansk/servo,KiChjang/servo,saneyuki/servo,cbrewster/servo,dsandeephegde/servo,mbrubeck/servo,larsbergstrom/servo,larsbergstrom/servo,SimonSapin/servo,szeged/servo,jimberlage/servo,mbrubeck/servo,sadmansk/servo,canaltinova/servo,SimonSapin/servo,upsuper/servo,mattnenterprise/servo,DominoTree/servo,nnethercote/servo,canaltinova/servo,notriddle/servo,cbrewster/servo,fiji-flo/servo,mattnenterprise/servo,anthgur/servo,avadacatavra/servo,nnethercote/servo,canaltinova/servo,nnethercote/servo,szeged/servo,canaltinova/servo,nnethercote/servo,mbrubeck/servo,szeged/servo,pyfisch/servo,paulrouget/servo,mattnenterprise/servo,emilio/servo,pyfisch/servo,saneyuki/servo,cbrewster/servo,thiagopnts/servo,peterjoel/servo,nrc/servo,splav/servo,notriddle/servo,emilio/servo,jimberlage/servo,peterjoel/servo,anthgur/servo,SimonSapin/servo,sadmansk/servo,sadmansk/servo,mattnenterprise/servo,dati91/servo,jimberlage/servo,emilio/servo,szeged/servo,thiagopnts/servo,saneyuki/servo,paulrouget/servo,DominoTree/servo,eddyb/servo,thiagopnts/servo,pyfisch/servo,rnestler/servo,eddyb/servo,thiagopnts/servo,emilio/servo,dsandeephegde/servo,DominoTree/servo,KiChjang/servo,upsuper/servo,thiagopnts/servo,CJ8664/servo,fiji-flo/servo,sadmansk/servo,mbrubeck/servo,anthgur/servo,nrc/servo,upsuper/servo,splav/servo,larsbergstrom/servo,dati91/servo,nnethercote/servo,cbrewster/servo,dsandeephegde/servo,KiChjang/servo,anthgur/servo,fiji-flo/servo,nrc/servo,rnestler/servo,paulrouget/servo,paulrouget/servo,fiji-flo/servo,peterjoel/servo,KiChjang/servo,pyfisch/servo,anthgur/servo,avadacatavra/servo,rnestler/servo,emilio/servo,ConnorGBrewster/servo,KiChjang/servo,peterjoel/servo,dsandeephegde/servo,avadacatavra/servo,fiji-flo/servo,saneyuki/servo,peterjoel/servo,emilio/servo,upsuper/servo,fiji-flo/servo,jimberlage/servo,paulrouget/servo,notriddle/servo,canaltinova/servo,DominoTree/servo,mattnenterprise/servo,SimonSapin/servo,ConnorGBrewster/servo,sadmansk/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,rnestler/servo,KiChjang/servo,upsuper/servo,thiagopnts/servo,fiji-flo/servo,CJ8664/servo,splav/servo,larsbergstrom/servo,eddyb/servo,szeged/servo,thiagopnts/servo,upsuper/servo,dati91/servo,saneyuki/servo,KiChjang/servo,ConnorGBrewster/servo,jimberlage/servo,SimonSapin/servo,notriddle/servo,peterjoel/servo,fiji-flo/servo,saneyuki/servo,splav/servo,peterjoel/servo,szeged/servo,avadacatavra/servo,emilio/servo,avadacatavra/servo,anthgur/servo,szeged/servo,KiChjang/servo,paulrouget/servo,mbrubeck/servo,dati91/servo,nnethercote/servo,peterjoel/servo,pyfisch/servo,saneyuki/servo,pyfisch/servo,avadacatavra/servo,larsbergstrom/servo,SimonSapin/servo,nrc/servo,CJ8664/servo,sadmansk/servo,canaltinova/servo,dati91/servo,ConnorGBrewster/servo,mattnenterprise/servo,emilio/servo,mbrubeck/servo,KiChjang/servo,CJ8664/servo,upsuper/servo,ConnorGBrewster/servo,notriddle/servo,splav/servo,notriddle/servo,nnethercote/servo,larsbergstrom/servo,szeged/servo,nnethercote/servo,DominoTree/servo,canaltinova/servo,dsandeephegde/servo,eddyb/servo,pyfisch/servo,dsandeephegde/servo,anthgur/servo,paulrouget/servo,notriddle/servo,DominoTree/servo,thiagopnts/servo,paulrouget/servo,anthgur/servo,mbrubeck/servo,dati91/servo,pyfisch/servo,notriddle/servo,cbrewster/servo,larsbergstrom/servo,jimberlage/servo,avadacatavra/servo,eddyb/servo,nnethercote/servo,rnestler/servo,rnestler/servo,cbrewster/servo,szeged/servo,peterjoel/servo,rnestler/servo,mbrubeck/servo,splav/servo,pyfisch/servo,notriddle/servo,SimonSapin/servo,SimonSapin/servo,splav/servo,larsbergstrom/servo,splav/servo,pyfisch/servo,splav/servo,cbrewster/servo,larsbergstrom/servo,upsuper/servo,szeged/servo,rnestler/servo