fix(@angular-devkit/schematics): update Rule type to support returning a Promise of Tree
          
            #24424
        
      | Job | Run time | 
|---|---|
| 8s | |
| 8s | 
Rule type to support returning a Promise of Tree
          
            #24424
        
| Job | Run time | 
|---|---|
| 8s | |
| 8s |