Disable open trigger file in configFileEvent

Workaround for #28593

**Bug**
TypeScript Server is hanging onto a file in `node_modules/.staging`, causing npm installs to fail. I believe the root cause is that 0d5c9f4 changed vscode logic to always open the `triggerFile` in config diagnostic events.  In this case, TS sends us a trigger file from `.staging` which we then tell the TS Server to open

**Fix**
Disable checking the trigger file

Author: mjbvz

extensions/typescript/src/typescriptMain.ts

@@ -660,7 +660,9 @@ class TypeScriptServiceClientHost implements ITypescriptServiceClientHost {
 			return;
 		}
 
-		(body.triggerFile ? this.findLanguage(body.triggerFile) : this.findLanguage(body.configFile)).then(language => {
+		// TODO: restore opening trigger file?
+		//     body.triggerFile ? this.findLanguage(body.triggerFile)
+		(this.findLanguage(body.configFile)).then(language => {
 			if (!language) {
 				return;
 			}