fix: add host_progress_callback parameter to mock_call_tool in test

The test_call_tool_without_broken_pipe_error was failing because the mock function did not accept the host_progress_callback keyword argument that the actual implementation passes to client.call_tool(). Updated the mock to accept this parameter to match the real implementation signature.

tests/test_litellm/proxy/_experimental/mcp_server/test_mcp_server_manager.py

@@ -1885,7 +1885,7 @@ class TestMCPServerManager:
         # Create mock client that tracks call_tool usage
         mock_client = AsyncMock()
 
-        async def mock_call_tool(params):
+        async def mock_call_tool(params, host_progress_callback=None):
             # Return a mock CallToolResult
             result = MagicMock(spec=CallToolResult)
             result.content = [{"type": "text", "text": "Tool executed successfully"}]