[BUG]

### API Spec link

https://github.com/Azure/azure-rest-api-specs/tree/main/specification/search/data-plane/Azure.Search

### API Spec version

2024-03-01-preview

### Describe the bug

This references https://github.com/Azure/azure-sdk-for-python/issues/34651. **FeaturesMode** parameter is missing from swagger spec.

FeaturesMode: https://learn.microsoft.com/en-us/rest/api/searchservice/preview-api/search-documents

### Expected behavior

Swagger Spec mentions **featuresMode** parameter which can be added in the azure AI sdk.

### Actual behavior

**featuresMode** parameter is absent from the swagger spec.

### Reproduction Steps

https://github.com/Azure/azure-rest-api-specs/tree/main/specification/search/data-plane/Azure.Search is missing **"featuresMode"**

### Environment

_No response_