Use separate output channels for language server and extension

When I start a Java project, there are two output channels created:

1. "Language Support for Java"
2. "Language Support for Java (Syntax Server)

They both seem to collect output from whichever language server the extension starts. Since we can either have the "syntax server" or the "standard server" running, I'm not quite sure what we have two different channels. If we're mixing output from the extension itself with the output from the language server, I would not expect two different channels. If we have a separate channel for the extensions, I would expect only the relevant language server output channel to be created.

首先定位扩展创建 "Language Support for Java" 和 "Language Support for Java (Syntax Server)" 输出通道的位置，然后比较标准服务器和语法服务器的启动路径。完成的标准是扩展输出得到适当分离，并且只创建相关的 language-server 通道；验证使用每个服务器启动 Java 项目时的行为。