ci: disable outdated Angular robot merge and triage behavior
ci: disable outdated Angular robot merge and triage behavior

The issue triage behavior is no longer used within this repository.
For the merge behavior, only the label status checks are potentially
beneficial but they are already checked via the `ng-dev` tooling
when merging.

angular/angular-cli,clydin/angular-cli,clydin/angular-cli,angular/angular-cli,angular/angular-cli,clydin/angular-cli,clydin/angular-cli,angular/angular-cli