azure: remove the pacman cache and .git dir before starting the build to save some space
azure: remove the pacman cache and .git dir before starting the build to save some space

The D drive is 14GB and after installing MSYS2 and qt5 there isn't much left.
This only gives us ~200MB back, but better than nothing.

RickLeaf/MINGW-packages,mati865/MINGW-packages,mati865/MINGW-packages,qme/MINGW-packages,oscarfv/MINGW-packages,lhmouse/MINGW-packages,int19h/MINGW-packages,oroppas/MINGW-packages,oroppas/MINGW-packages,mashir43/MINGW-packages,oscarfv/MINGW-packages,KrullBorg/MINGW-packages,nazar554/MINGW-packages,nickoe/MINGW-packages,KrullKorg/MINGW-packages,nickoe/MINGW-packages,mashir43/MINGW-packages,oroppas/MINGW-packages,Alexpux/MINGW-packages,jtanx/MINGW-packages,stahta01/MINGW-packages,RickLeaf/MINGW-packages,Alexpux/MINGW-packages,nickoe/MINGW-packages,oscarfv/MINGW-packages,Alexpux/MINGW-packages,fabiangreffrath/MINGW-packages,Ede123/MINGW-packages,KrullBorg/MINGW-packages,Ede123/MINGW-packages,stambaughw/MINGW-packages,peterbud/MINGW-packages,stahta01/MINGW-packages,nazar554/MINGW-packages,JPeterMugaas/MINGW-packages,jeroenooms/MINGW-packages,bjlemke/MINGW-packages,Ede123/MINGW-packages,fabiangreffrath/MINGW-packages,qme/MINGW-packages,qme/MINGW-packages,fabiangreffrath/MINGW-packages,JPeterMugaas/MINGW-packages,int19h/MINGW-packages,InitialForce/MINGW-packages,RickLeaf/MINGW-packages,mati865/MINGW-packages,lhmouse/MINGW-packages,jtanx/MINGW-packages,oscarfv/MINGW-packages,JPeterMugaas/MINGW-packages,RickLeaf/MINGW-packages,irakhlin/MINGW-packages,stahta01/MINGW-packages,lhmouse/MINGW-packages,peterbud/MINGW-packages,mati865/MINGW-packages,Optiligence/MINGW-packages,JPeterMugaas/MINGW-packages,bjlemke/MINGW-packages,Chocobo1/MINGW-packages,stambaughw/MINGW-packages,JPeterMugaas/MINGW-packages,Alexpux/MINGW-packages,InitialForce/MINGW-packages,Alexpux/MINGW-packages,jtanx/MINGW-packages,KrullBorg/MINGW-packages,Alexpux/MINGW-packages,stahta01/MINGW-packages,nazar554/MINGW-packages,lhmouse/MINGW-packages,KrullBorg/MINGW-packages,lhmouse/MINGW-packages,peterbud/MINGW-packages,qme/MINGW-packages,InitialForce/MINGW-packages,irakhlin/MINGW-packages,Chocobo1/MINGW-packages,int19h/MINGW-packages,int19h/MINGW-packages,mashir43/MINGW-packages,bjlemke/MINGW-packages,jeroenooms/MINGW-packages,Ede123/MINGW-packages,nazar554/MINGW-packages,lhmouse/MINGW-packages,jeroenooms/MINGW-packages,peterbud/MINGW-packages,fabiangreffrath/MINGW-packages,oscarfv/MINGW-packages,stahta01/MINGW-packages,oroppas/MINGW-packages,JPeterMugaas/MINGW-packages,stambaughw/MINGW-packages,Chocobo1/MINGW-packages,oscarfv/MINGW-packages,KrullKorg/MINGW-packages,Optiligence/MINGW-packages,KrullKorg/MINGW-packages,fabiangreffrath/MINGW-packages,Optiligence/MINGW-packages,bjlemke/MINGW-packages,irakhlin/MINGW-packages,mati865/MINGW-packages,oroppas/MINGW-packages,stahta01/MINGW-packages,mashir43/MINGW-packages,oroppas/MINGW-packages,fabiangreffrath/MINGW-packages,jtanx/MINGW-packages,irakhlin/MINGW-packages,Optiligence/MINGW-packages