Auto merge of #19206 - asajeffrey:test-perf-add-differ-summary, r=aneeshusa
Auto merge of #19206 - asajeffrey:test-perf-add-differ-summary, r=aneeshusa

Add total time to test_differ in etc/ci/performance

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Add the total time to test_differ in etc/ci/performance.

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- [X] `./mach test-tidy` does not report any errors
- [X] These changes do not require tests because this is test infrastructure

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