handle importlib-metadata deprecation (#7774)

src/poetry/repositories/installed_repository.py

@@ -257,9 +257,8 @@ class InstalledRepository(Repository):
                 if path in skipped:
                     continue
 
-                try:
-                    name = canonicalize_name(distribution.metadata["name"])
-                except TypeError:
+                name = distribution.metadata.get("name")  # type: ignore[attr-defined]
+                if name is None:
                     logger.warning(
                         (
                             "Project environment contains an invalid distribution"
@@ -271,6 +270,8 @@ class InstalledRepository(Repository):
                     skipped.add(path)
                     continue
 
+                name = canonicalize_name(name)
+
                 if name in seen:
                     continue