feat(verification): various improvements (#1921)

# What does this PR do?
- provider and their models now live in config.yaml
- better distinguish different cases within a test
- add model key to surface provider's model_id
- include example command to rerun single test case

## Test Plan
<img width="1173" alt="image"
src="https://github.com/user-attachments/assets/b414baf0-c768-451f-8c3b-c2905cf36fac"
/>

tests/verifications/conf/cerebras.yaml

@@ -0,0 +1,10 @@
+base_url: https://api.cerebras.ai/v1
+api_key_var: CEREBRAS_API_KEY
+models:
+- llama-3.3-70b
+model_display_names:
+  llama-3.3-70b: Llama-3.3-70B-Instruct
+test_exclusions:
+  llama-3.3-70b:
+  - test_chat_non_streaming_image
+  - test_chat_streaming_image

tests/verifications/conf/fireworks.yaml

@@ -0,0 +1,14 @@
+base_url: https://api.fireworks.ai/inference/v1
+api_key_var: FIREWORKS_API_KEY
+models:
+- accounts/fireworks/models/llama-v3p3-70b-instruct
+- accounts/fireworks/models/llama4-scout-instruct-basic
+- accounts/fireworks/models/llama4-maverick-instruct-basic
+model_display_names:
+  accounts/fireworks/models/llama-v3p3-70b-instruct: Llama-3.3-70B-Instruct
+  accounts/fireworks/models/llama4-scout-instruct-basic: Llama-4-Scout-Instruct
+  accounts/fireworks/models/llama4-maverick-instruct-basic: Llama-4-Maverick-Instruct
+test_exclusions:
+  accounts/fireworks/models/llama-v3p3-70b-instruct:
+  - test_chat_non_streaming_image
+  - test_chat_streaming_image

tests/verifications/conf/groq.yaml

@@ -0,0 +1,14 @@
+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
+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
+test_exclusions:
+  llama-3.3-70b-versatile:
+  - test_chat_non_streaming_image
+  - test_chat_streaming_image

tests/verifications/conf/openai.yaml

@@ -0,0 +1,9 @@
+base_url: https://api.openai.com/v1
+api_key_var: OPENAI_API_KEY
+models:
+- gpt-4o
+- gpt-4o-mini
+model_display_names:
+  gpt-4o: gpt-4o
+  gpt-4o-mini: gpt-4o-mini
+test_exclusions: {}

tests/verifications/conf/together.yaml

@@ -0,0 +1,14 @@
+base_url: https://api.together.xyz/v1
+api_key_var: TOGETHER_API_KEY
+models:
+- meta-llama/Llama-3.3-70B-Instruct-Turbo
+- meta-llama/Llama-4-Scout-17B-16E-Instruct
+- meta-llama/Llama-4-Maverick-17B-128E-Instruct-FP8
+model_display_names:
+  meta-llama/Llama-3.3-70B-Instruct-Turbo: Llama-3.3-70B-Instruct
+  meta-llama/Llama-4-Scout-17B-16E-Instruct: Llama-4-Scout-Instruct
+  meta-llama/Llama-4-Maverick-17B-128E-Instruct-FP8: Llama-4-Maverick-Instruct
+test_exclusions:
+  meta-llama/Llama-3.3-70B-Instruct-Turbo:
+  - test_chat_non_streaming_image
+  - test_chat_streaming_image