move models, model display name, case, reorg config

# What does this PR do?


## Test Plan
# What does this PR do?


## Test Plan
# What does this PR do?


## Test Plan
# What does this PR do?


## Test Plan

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: {}