Import: Disable thread import for OBJ meshes
Import: Disable thread import for OBJ meshes

This can currently lead to deadlocks, possibly due to some race condition
in the Vulkan renderer.

Works around #48265.

Valentactive/godot,godotengine/godot,pkowal1982/godot,DmitriySalnikov/godot,firefly2442/godot,josempans/godot,firefly2442/godot,godotengine/godot,godotengine/godot,Zylann/godot,Valentactive/godot,josempans/godot,ZuBsPaCe/godot,Zylann/godot,vkbsb/godot,firefly2442/godot,akien-mga/godot,firefly2442/godot,ZuBsPaCe/godot,Shockblast/godot,DmitriySalnikov/godot,josempans/godot,akien-mga/godot,Faless/godot,Faless/godot,vnen/godot,firefly2442/godot,Zylann/godot,vkbsb/godot,vkbsb/godot,pkowal1982/godot,sanikoyes/godot,BastiaanOlij/godot,godotengine/godot,firefly2442/godot,ZuBsPaCe/godot,vkbsb/godot,pkowal1982/godot,vnen/godot,godotengine/godot,ZuBsPaCe/godot,vnen/godot,BastiaanOlij/godot,BastiaanOlij/godot,DmitriySalnikov/godot,akien-mga/godot,Shockblast/godot,Faless/godot,guilhermefelipecgs/godot,Faless/godot,Shockblast/godot,Faless/godot,guilhermefelipecgs/godot,Valentactive/godot,ZuBsPaCe/godot,godotengine/godot,Shockblast/godot,Zylann/godot,josempans/godot,pkowal1982/godot,Shockblast/godot,pkowal1982/godot,BastiaanOlij/godot,DmitriySalnikov/godot,sanikoyes/godot,sanikoyes/godot,pkowal1982/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,guilhermefelipecgs/godot,Faless/godot,BastiaanOlij/godot,Faless/godot,vkbsb/godot,vnen/godot,Shockblast/godot,sanikoyes/godot,Zylann/godot,vnen/godot,firefly2442/godot,BastiaanOlij/godot,josempans/godot,vkbsb/godot,DmitriySalnikov/godot,DmitriySalnikov/godot,pkowal1982/godot,Valentactive/godot,godotengine/godot,akien-mga/godot,sanikoyes/godot,akien-mga/godot,Zylann/godot,guilhermefelipecgs/godot,ZuBsPaCe/godot,Shockblast/godot,akien-mga/godot,vkbsb/godot,akien-mga/godot,Zylann/godot,ZuBsPaCe/godot,akien-mga/godot,josempans/godot,firefly2442/godot,guilhermefelipecgs/godot,Zylann/godot,vnen/godot,Valentactive/godot,Valentactive/godot,ZuBsPaCe/godot,BastiaanOlij/godot,josempans/godot,Faless/godot,vnen/godot,josempans/godot,Valentactive/godot,Valentactive/godot,guilhermefelipecgs/godot,pkowal1982/godot,sanikoyes/godot,DmitriySalnikov/godot,sanikoyes/godot,guilhermefelipecgs/godot,sanikoyes/godot,vnen/godot,godotengine/godot,Shockblast/godot,vkbsb/godot