refactor: deprecate poetry.repositories.cached

src/poetry/repositories/cached.py

+from __future__ import annotations
+
+import warnings
+
+
+from poetry.repositories.cached_repository import (  # isort: skip # nopycln: import # noqa: E501, F401
+    CachedRepository,
+)
+
+warnings.warn(
+    "Module poetry.repositories.cached is renamed and scheduled for removal in poetry"
+    " release 1.4.0. Please migrate to poetry.repositories.cached_repository.",
+    DeprecationWarning,
+    stacklevel=2,
+)