fix: resolve @angular/language-service from root node_module
fix: resolve @angular/language-service from root node_module

All dependencies are now listed in root node_modules, so we should not
resolve `@angular/language-service` from `server`.

angular/vscode-ng-language-service,angular/vscode-ng-language-service,angular/vscode-ng-language-service,angular/vscode-ng-language-service