fix(common_utils.py): handle $id in response schema when calling vert… (#8991)

* fix(common_utils.py): handle $id in response schema when calling vertex ai

Fixes issue where `$id` present in response_schema was not accepted by vertex ai

* test(test_vertex.py): add unit test to ensure $id stripped out of vertex schema

litellm/proxy/proxy_server.py

@@ -7059,6 +7059,9 @@ async def delete_model(model_info: ModelInfoDelete):
             )
 
     except Exception as e:
+        verbose_proxy_logger.exception(
+            f"Failed to delete model. Due to error - {str(e)}"
+        )
         if isinstance(e, HTTPException):
             raise ProxyException(
                 message=getattr(e, "detail", f"Authentication Error({str(e)})"),