Remove "clickhouse" from telemetry code

The client sends events to our end point, and the endpoint is what determines what analytics database is used to store the data. The client should be generic and not mention the name of the service being proxied to through our server.

crates/zed/src/main.rs

@@ -179,7 +179,7 @@ fn main() {
             Some(false) => "first open",
             _ => "open",
         });
-        telemetry.flush_clickhouse_events();
+        telemetry.flush_events();
 
         let app_state = Arc::new(AppState {
             languages: languages.clone(),