chore: made inbuilt tools blocking calls into async non blocking calls (#1509)

# What does this PR do?
This PR converts blocking calls for in built tools like wolfram, brave,
tavily and bing into non blocking async calls
[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan
[Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.*]
pytest -s -v tool_runtime/test_builtin_tools.py --stack-config=together
--text-model=meta-llama/Llama-3.1-8B-Instruct
Used the command above to get the below results
<img width="1710" alt="image"
src="https://github.com/user-attachments/assets/76b0ca06-f6e4-45fa-a114-0449bef2325b"
/>


<img width="1389" alt="image"
src="https://github.com/user-attachments/assets/5220ccbb-7882-4240-b17e-f362ad46d25b"
/>

<img width="1432" alt="image"
src="https://github.com/user-attachments/assets/bb93a41e-e82a-4c98-a22d-6b0e320aa974"
/>

[//]: # (## Documentation)

---------

Co-authored-by: sarthakdeshpande <sarthak.deshpande@engati.com>

llama_stack/providers/utils/kvstore/mongodb/mongodb.py

@@ -8,9 +8,11 @@ import logging
 from datetime import datetime
 from typing import List, Optional
 
-from pymongo import MongoClient
+from pymongo import AsyncMongoClient
 
-from llama_stack.providers.utils.kvstore import KVStore, MongoDBKVStoreConfig
+from llama_stack.providers.utils.kvstore import KVStore
+
+from ..config import MongoDBKVStoreConfig
 
 log = logging.getLogger(__name__)
 
@@ -30,7 +32,7 @@ class MongoDBKVStoreImpl(KVStore):
                 "password": self.config.password,
             }
             conn_creds = {k: v for k, v in conn_creds.items() if v is not None}
-            self.conn = MongoClient(**conn_creds)
+            self.conn = AsyncMongoClient(**conn_creds)
             self.collection = self.conn[self.config.db][self.config.collection_name]
         except Exception as e:
             log.exception("Could not connect to MongoDB database server")
@@ -44,17 +46,17 @@ class MongoDBKVStoreImpl(KVStore):
     async def set(self, key: str, value: str, expiration: Optional[datetime] = None) -> None:
         key = self._namespaced_key(key)
         update_query = {"$set": {"value": value, "expiration": expiration}}
-        self.collection.update_one({"key": key}, update_query, upsert=True)
+        await self.collection.update_one({"key": key}, update_query, upsert=True)
 
     async def get(self, key: str) -> Optional[str]:
         key = self._namespaced_key(key)
         query = {"key": key}
-        result = self.collection.find_one(query, {"value": 1, "_id": 0})
+        result = await self.collection.find_one(query, {"value": 1, "_id": 0})
         return result["value"] if result else None
 
     async def delete(self, key: str) -> None:
         key = self._namespaced_key(key)
-        self.collection.delete_one({"key": key})
+        await self.collection.delete_one({"key": key})
 
     async def range(self, start_key: str, end_key: str) -> List[str]:
         start_key = self._namespaced_key(start_key)
@@ -63,4 +65,7 @@ class MongoDBKVStoreImpl(KVStore):
             "key": {"$gte": start_key, "$lt": end_key},
         }
         cursor = self.collection.find(query, {"value": 1, "_id": 0}).sort("key", 1)
-        return [doc["value"] for doc in cursor]
+        result = []
+        async for doc in cursor:
+            result.append(doc["value"])
+        return result