safety API cleanup part 1

Sample adapter implementation for Bedrock implementation of Guardrails

llama_stack/providers/adapters/safety/bedrock/config.py

@@ -0,0 +1,12 @@
+# 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 pydantic import BaseModel
+
+
+class BedrockSafetyRequestProviderData(BaseModel):
+    aws_api_key: str
+    # other AWS specific keys you may need