ENH: disable saving the bytecode cache for editable Python modules

This avoids cluttering the source directory with bytecode cache. It
should also avoid surprising behavior when the source is removed from
version control but the bytecode cache is still present in the working
directory.

mesonpy/_editable.py

@@ -148,6 +148,10 @@ def __init__(self, name: str, path: str, tree: Node):
         super().__init__(name, path)
         self._tree = tree
 
+    def set_data(self, path: Union[bytes, str], data: bytes, *, _mode: int = ...) -> None:
+        # disable saving bytecode
+        pass
+
     def get_resource_reader(self, name: str) -> TraversableResources:
         return MesonpyReader(name, self._tree)