chore: Nebius through portkey dropped qwen3-14b (#603)

## Description
<!-- What does this PR do? -->


## PR Type

<!-- Delete the types that don't apply --!>

💅 Refactor

## Relevant issues

<!-- e.g. "Fixes #123" -->

## Checklist
- [ ] I have added unit tests that prove my fix/feature works
- [ ] New and existing tests pass locally
- [ ] Documentation was updated where necessary
- [ ] I have read and followed the [contribution
guidelines](https://github.com/mozilla-ai/any-llm/blob/main/CONTRIBUTING.md)```

Author: njbrake

tests/conftest.py

@@ -34,7 +34,7 @@ def provider_reasoning_model_map() -> dict[LLMProvider, str]:
         LLMProvider.NEBIUS: "openai/gpt-oss-20b",
         LLMProvider.SAMBANOVA: "DeepSeek-R1-Distill-Llama-70B",
         LLMProvider.TOGETHER: "OpenAI/gpt-oss-20B",
-        LLMProvider.PORTKEY: "@nebius-any-llm/Qwen/Qwen3-14B",
+        LLMProvider.PORTKEY: "@nebius-any-llm/Qwen/Qwen3-32B",
         LLMProvider.MINIMAX: "MiniMax-M2",
         LLMProvider.ZAI: "glm-4.5-flash",
     }