Improve groq OpenAI API compatibility

This doesn't get Groq to 100% on the OpenAI API verification tests,
but it does get it to 88.2% when Llama Stack is in the middle,
compared to the 61.8% results for using an OpenAI client against Groq
directly.

The groq provider doesn't use litellm under the covers in its
openai_chat_completion endpoint, and instead directly uses an
AsyncOpenAI client with some special handling to improve conformance
of responses for response_format usage and tool calling.

Signed-off-by: Ben Browning <bbrownin@redhat.com>

tests/verifications/conf/groq-llama-stack.yaml

@@ -0,0 +1,14 @@
+base_url: http://localhost:8321/v1/openai/v1
+api_key_var: GROQ_API_KEY
+models:
+- groq/llama-3.3-70b-versatile
+- groq/llama-4-scout-17b-16e-instruct
+- groq/llama-4-maverick-17b-128e-instruct
+model_display_names:
+  groq/llama-3.3-70b-versatile: Llama-3.3-70B-Instruct
+  groq/llama-4-scout-17b-16e-instruct: Llama-4-Scout-Instruct
+  groq/llama-4-maverick-17b-128e-instruct: Llama-4-Maverick-Instruct
+test_exclusions:
+  groq/llama-3.3-70b-versatile:
+  - test_chat_non_streaming_image
+  - test_chat_streaming_image

tests/verifications/conf/groq.yaml

@@ -2,12 +2,12 @@ base_url: https://api.groq.com/openai/v1
 api_key_var: GROQ_API_KEY
 models:
 - llama-3.3-70b-versatile
-- llama-4-scout-17b-16e-instruct
-- llama-4-maverick-17b-128e-instruct
+- meta-llama/llama-4-scout-17b-16e-instruct
+- meta-llama/llama-4-maverick-17b-128e-instruct
 model_display_names:
   llama-3.3-70b-versatile: Llama-3.3-70B-Instruct
-  llama-4-scout-17b-16e-instruct: Llama-4-Scout-Instruct
-  llama-4-maverick-17b-128e-instruct: Llama-4-Maverick-Instruct
+  meta-llama/llama-4-scout-17b-16e-instruct: Llama-4-Scout-Instruct
+  meta-llama/llama-4-maverick-17b-128e-instruct: Llama-4-Maverick-Instruct
 test_exclusions:
   llama-3.3-70b-versatile:
   - test_chat_non_streaming_image

tests/verifications/conf/openai-llama-stack.yaml

@@ -1,9 +1,9 @@
 base_url: http://localhost:8321/v1/openai/v1
 api_key_var: OPENAI_API_KEY
 models:
-- gpt-4o
-- gpt-4o-mini
+- openai/gpt-4o
+- openai/gpt-4o-mini
 model_display_names:
-  gpt-4o: gpt-4o
-  gpt-4o-mini: gpt-4o-mini
+  openai/gpt-4o: gpt-4o
+  openai/gpt-4o-mini: gpt-4o-mini
 test_exclusions: {}