feat(ci): Add LMStudio to self-hosted provider checks (#3623)

Co-authored-by: Kian Jones <kian@Kians-MacBook-Pro.local>

tests/configs/llm_model_configs/lmstudio.json

@@ -0,0 +1,8 @@
+{
+  "context_window": 8192,
+  "model": "qwen2.5-7b-instruct-1m",
+  "model_endpoint_type": "openai",
+  "model_endpoint": "http://127.0.0.1:1234/v1",
+  "model_wrapper": null,
+  "provider_name": "lmstudio_openai"
+}