fix(oci): cover both import-untyped and import-not-found for oci SDK

When oci is installed but lacks stubs, mypy raises import-untyped.
When oci is not installed (optional dep), mypy raises import-not-found.
Cover both cases since cohere[oci] is optional.

Author: fede-kamel

src/cohere/manually_maintained/lazy_oci_deps.py

@@ -24,7 +24,7 @@ def lazy_oci() -> Any:
         ImportError: If the OCI SDK is not installed
     """
     try:
-        import oci  # type: ignore[import-untyped]
+        import oci  # type: ignore[import-untyped, import-not-found]
         return oci
     except ImportError:
         raise ImportError(OCI_INSTALLATION_MESSAGE)