Revert "fix: Always handle the extra response outside of stream, such as the exceptions from bedrock (#1526)" (#1569)

This reverts commit f9ab6934d2.

lua/avante/types.lua

@@ -261,6 +261,7 @@ vim.g.avante_login = vim.g.avante_login
 ---@field parse_messages AvanteMessagesParser
 ---@field parse_response AvanteResponseParser
 ---@field parse_curl_args AvanteCurlArgsParser
+---@field is_disable_stream fun(self: AvanteProviderFunctor): boolean
 ---@field setup fun(): nil
 ---@field is_env_set fun(): boolean
 ---@field api_key_name string