Auto merge of #18303 - glennw:update-wr-debug-again, r=jdm
Auto merge of #18303 - glennw:update-wr-debug-again, r=jdm

Update WR (improved debugger, texture cache, PBO texture updates).

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