Fix return type of array_reverse() with optional keys
          
            #5154
        
      | Job | Run time | 
|---|---|
| 1m 37s | |
| 1m 57s | |
| 1m 34s | |
| 1m 44s | |
| 1m 24s | |
| 1m 23s | |
| 1m 20s | |
| 1m 37s | |
| 12m 36s | 
array_reverse() with optional keys
          
            #5154
        
| Job | Run time | 
|---|---|
| 1m 37s | |
| 1m 57s | |
| 1m 34s | |
| 1m 44s | |
| 1m 24s | |
| 1m 23s | |
| 1m 20s | |
| 1m 37s | |
| 12m 36s |