Implement CppLspAdapter::name by delegating to CLspAdapter::name

This makes it more evident that both languages share the same language
server.

Co-Authored-By: Max Brunsfeld <max@zed.dev>

crates/zed/src/languages/cpp.rs

@@ -8,7 +8,7 @@ pub struct CppLspAdapter;
 
 impl super::LspAdapter for CppLspAdapter {
     fn name(&self) -> LanguageServerName {
-        LanguageServerName("clangd".into())
+        super::c::CLspAdapter.name()
     }
 
     fn fetch_latest_server_version(