Return metrics from train (#2702)

Signed-off-by: Ashwin Vaidya <ashwinnitinvaidya@gmail.com>

Author: ashwinvaidya17

src/anomalib/engine/engine.py

@@ -721,7 +721,7 @@ def train(
             self.trainer.validate(model, val_dataloaders, None, verbose=False, datamodule=datamodule)
         else:
             self.trainer.fit(model, train_dataloaders, val_dataloaders, datamodule, ckpt_path)
-        self.trainer.test(model, test_dataloaders, ckpt_path=ckpt_path, datamodule=datamodule)
+        return self.trainer.test(model, test_dataloaders, ckpt_path=ckpt_path, datamodule=datamodule)
 
     def export(
         self,