Handles name == None case (re: issue python-poetry#4311)

Addresses issue python-poetry#4311 and others, related to `canonicalize_name` throwing TypeError because a str or bytes like object was expected.

poetry/repositories/installed_repository.py

@@ -231,8 +231,13 @@ def load(cls, env: Env, with_dependencies: bool = False) -> "InstalledRepository
                 metadata.distributions(path=[entry]),
                 key=lambda d: str(d._path),
             ):
-                name = canonicalize_name(distribution.metadata["name"])
-
+                try:
+                    name = canonicalize_name(distribution.metadata["name"])
+                except TypeError as e:
+                    # handling the case where a distribution is empty but is nevertheless picked up in the search
+                    # and its name is `None`
+                    continue
+
                 if name in seen:
                     continue