Initial commit for postgresql dataset provider

Core implementation of postgresql dataset for llama stack

Signed-off-by: Josh Salomon <jsalomon@redhat.com>

llama_stack/providers/utils/common/provider_utils.py

@@ -0,0 +1,15 @@
+# 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.
+
+
+def get_provider_type(module: str) -> str:
+    parts = module.split(".")
+    if parts[0] != "llama_stack" or parts[1] != "providers":
+        raise ValueError(f"Invalid module name <{module}>")
+    if parts[2] == "inline" or parts[2] == "remote":
+        return parts[2]
+    else:
+        raise ValueError(f"Invalid module name <{module}>")