test: update mesh tests to new scene graph structure
test: update mesh tests to new scene graph structure

aug2uag/engine,nmai/engine,CedarLogic/engine,arunabhdas/engine,manyoo/engine,artichox/engine,talves/famous-engine,prepare/engine,tbossert/engine,TheAlphaNerd/engine,infamous/famous-engine,andreaslangsays/engine,Bizboard/engine,andreaslangsays/engine,infamous/engine,alexanderGugel/engine,aug2uag/engine,woltemade/engine,steveblue/engine,sonwh98/engine,trusktr/engine,redwoodfavorite/engine,steveblue/engine,alexanderGugel/engine,nmai/engine,avikalpa/engine,noikiy/engine,Morgantheplant/engine,codesdk/engine,IjzerenHein/engine,woltemade/engine,huanghjb/engine,infamous/engine,trusktr/engine,mcanthony/engine,IjzerenHein/engine,codesdk/engine,Wanderfalke/engine,Wanderfalke/engine,artichox/engine,redwoodfavorite/engine,Famous/engine,TheAlphaNerd/engine,yummy222/engine,infamous/famous-engine,talves/famous-engine,huanghjb/engine,mcanthony/engine,tbossert/engine,beni55/engine,Famous/engine,CedarLogic/engine,yummy222/engine,avikalpa/engine,sonwh98/engine,noikiy/engine,prepare/engine,arunabhdas/engine,Bizboard/engine,Morgantheplant/engine,beni55/engine,manyoo/engine