Minor update to generate splat files in inference mode (#3432)

changed gaussian splat export to inference mode

Author: maxwildersmith

nerfstudio/scripts/exporter.py

@@ -547,7 +547,7 @@ def main(self) -> None:
         if not self.output_dir.exists():
             self.output_dir.mkdir(parents=True)
 
-        _, pipeline, _, _ = eval_setup(self.load_config)
+        _, pipeline, _, _ = eval_setup(self.load_config, test_mode="inference")
 
         assert isinstance(pipeline.model, SplatfactoModel)