fix: OpenAIChatGenerator - do not pass tools to the OpenAI client when none are provided
#15615
| Job | Run time |
|---|---|
| 13s | |
| 3m 35s | |
| 17s | |
| 5m 14s | |
| 2m 40s | |
| 2m 2s | |
| 6m 16s | |
| 4m 10s | |
| 7m 45s | |
| 1s | |
| 32m 13s |