Refactor Client's Block CRUD methods into Mixin

src/prefect/_internal/schemas/bases.py

@@ -16,6 +16,7 @@
 from typing_extensions import Self
 
 from prefect.types import DateTime
+from prefect.utilities.generics import validate_list
 
 T = TypeVar("T")
 
@@ -59,6 +60,17 @@ def __eq__(self, other: Any) -> bool:
         else:
             return copy_dict == other
 
+    @classmethod
+    def model_validate_list(
+        cls,
+        obj: Any,
+        *,
+        strict: Optional[bool] = None,
+        from_attributes: Optional[bool] = None,
+        context: Optional[Any] = None,
+    ) -> list[Self]:
+        return validate_list(cls, obj)
+
     def __rich_repr__(self) -> Generator[tuple[str, Any, Any], None, None]:
         # Display all of the fields in the model if they differ from the default value
         for name, field in self.model_fields.items():