[Bug]: Not able to get annotations from gpt4o-search-preview

### What happened?

Why am I not able to get annotations which include url_citations when I use gpt4o-search-preview?

### Relevant log output

```shell

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### Are you a ML Ops Team?

No

### What LiteLLM version are you on ?

1.51.0

### Twitter / LinkedIn details

_No response_