[1.3] fix: as_uri() can only be applied to an absolute path (#7272)

Co-authored-by: finswimmer <finswimmer77@gmail.com>

src/poetry/masonry/builders/editable.py

@@ -249,7 +249,7 @@ def _add_dist_info(self, added_files: list[Path]) -> None:
             json.dumps(
                 {
                     "dir_info": {"editable": True},
-                    "url": self._poetry.file.path.parent.as_uri(),
+                    "url": self._poetry.file.path.parent.absolute().as_uri(),
                 }
             )
         )