feat: Add Groq distribution template (#1173)

# What does this PR do?

Create a distribution template using Groq as inference provider.
Link to issue: https://github.com/meta-llama/llama-stack/issues/958


## Test Plan
Run `python llama_stack/scripts/distro_codegen.py` to generate run.yaml
and build.yaml
Test the newly created template by running
`llama stack build --template <template-name>`
`llama stack run <template-name>`

llama_stack/providers/remote/inference/groq/config.py

@@ -4,7 +4,7 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from typing import Optional
+from typing import Any, Dict, Optional
 
 from pydantic import BaseModel, Field
 
@@ -18,3 +18,15 @@ class GroqConfig(BaseModel):
         default=None,
         description="The Groq API key",
     )
+
+    url: str = Field(
+        default="https://api.groq.com",
+        description="The URL for the Groq AI server",
+    )
+
+    @classmethod
+    def sample_run_config(cls, **kwargs) -> Dict[str, Any]:
+        return {
+            "url": "https://api.groq.com",
+            "api_key": "${env.GROQ_API_KEY}",
+        }