Replace nosave and noval with save and val (#127)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

ultralytics/yolo/data/build.py

@@ -67,7 +67,7 @@ def build_dataloader(cfg, batch_size, img_path, stride=32, label_path=None, rank
             augment=mode == "train",  # augmentation
             hyp=cfg,  # TODO: probably add a get_hyps_from_cfg function
             rect=cfg.rect if mode == "train" else True,  # rectangular batches
-            cache=None if cfg.noval else cfg.get("cache", None),
+            cache=cfg.get("cache", None),
             single_cls=cfg.get("single_cls", False),
             stride=int(stride),
             pad=0.0 if mode == "train" else 0.5,