project tests: Add a new BuildStep called validate
project tests: Add a new BuildStep called validate

aaronp24/meson,ernestask/meson,trhd/meson,mesonbuild/meson,fmuellner/meson,mesonbuild/meson,rhd/meson,rhd/meson,rhd/meson,jpakkane/meson,jeandet/meson,MathieuDuponchelle/meson,MathieuDuponchelle/meson,aaronp24/meson,jeandet/meson,thiblahute/meson,QuLogic/meson,aaronp24/meson,ernestask/meson,thiblahute/meson,QuLogic/meson,aaronp24/meson,QuLogic/meson,thiblahute/meson,fmuellner/meson,becm/meson,QuLogic/meson,aaronp24/meson,fmuellner/meson,aaronp24/meson,ernestask/meson,thiblahute/meson,fmuellner/meson,trhd/meson,mesonbuild/meson,QuLogic/meson,MathieuDuponchelle/meson,mesonbuild/meson,jeandet/meson,QuLogic/meson,thiblahute/meson,QuLogic/meson,jpakkane/meson,mesonbuild/meson,wberrier/meson,rhd/meson,thiblahute/meson,becm/meson,ernestask/meson,fmuellner/meson,jpakkane/meson,thiblahute/meson,ernestask/meson,becm/meson,jpakkane/meson,wberrier/meson,rhd/meson,wberrier/meson,fmuellner/meson,rhd/meson,thiblahute/meson,MathieuDuponchelle/meson,fmuellner/meson,becm/meson,trhd/meson,aaronp24/meson,MathieuDuponchelle/meson,trhd/meson,jeandet/meson,fmuellner/meson,becm/meson,mesonbuild/meson,jpakkane/meson,becm/meson,ernestask/meson,pexip/meson,pexip/meson,fmuellner/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson,QuLogic/meson,thiblahute/meson,QuLogic/meson,becm/meson,becm/meson,trhd/meson,jeandet/meson,rhd/meson,becm/meson,aaronp24/meson,MathieuDuponchelle/meson,jeandet/meson,trhd/meson,mesonbuild/meson,pexip/meson,jpakkane/meson,wberrier/meson,MathieuDuponchelle/meson,jpakkane/meson,wberrier/meson,pexip/meson,pexip/meson,trhd/meson,wberrier/meson,MathieuDuponchelle/meson,trhd/meson,ernestask/meson,ernestask/meson,rhd/meson,mesonbuild/meson,aaronp24/meson,becm/meson,wberrier/meson,jeandet/meson,pexip/meson,pexip/meson,wberrier/meson,jeandet/meson,pexip/meson,trhd/meson,ernestask/meson,pexip/meson,MathieuDuponchelle/meson,jeandet/meson,jpakkane/meson,jpakkane/meson