Further generalize Xi's changes

- introduce a slightly more general notion of an AutoRouted provider
- the AutoRouted provider is associated with a RoutingTable provider
- e.g. inference -> models
- Introduced safety -> shields and memory -> memory_banks
  correspondences

llama_stack/providers/registry/models.py

@@ -1,22 +0,0 @@
-# Copyright (c) Meta Platforms, Inc. and affiliates.
-# All rights reserved.
-#
-# This source code is licensed under the terms described in the LICENSE file in
-# the root directory of this source tree.
-
-from typing import List
-
-from llama_stack.distribution.datatypes import *  # noqa: F403
-
-
-def available_providers() -> List[ProviderSpec]:
-    return [
-        BuiltinProviderSpec(
-            api=Api.models,
-            provider_id="builtin",
-            pip_packages=[],
-            module="llama_stack.providers.impls.builtin.models",
-            config_class="llama_stack.providers.impls.builtin.models.BuiltinImplConfig",
-            api_dependencies=[],
-        )
-    ]