vk: [BROKEN] postpone BLAS building until frame painting

Do not build BLASes on model creation. Collect all BLASes to be built,
and then build them just before the TLAS is built.

Known issues:
- crashes (timeout + device lost) RADV AMD on dynamic model update.

ref/vk/vk_brush.c

@@ -686,6 +686,7 @@ static void brushDrawWater(r_brush_water_model_t *wmodel, const cl_entity_t *ent
 
 	if (!R_RenderModelUpdate(&wmodel->render_model)) {
 		ERR("Failed to update brush model \"%s\" water", wmodel->render_model.debug_name);
+		return;
 	}
 
 	const material_mode_e material_mode = brushMaterialModeForRenderType(render_type);