feat(mcp): support all three transports of mcp server, i.e. stdio, sse and streamable-http.

[gali-leilei]

• add class ToolManagerV2 that support all three modes of MCP server transport. Keep class ToolManager for backward compatibility.
• add def create_mcp_server_parameters() in settings_v2.py that support all three modes of MCP server transport. Keep def create_mcp_server_parameters() in settings.py for backward compatibility.