Remove block_on from route manager drop impl
#10370
| Job | Run time |
|---|---|
| 3s | |
| 5m 33s | |
| 3m 9s | |
| 5s | |
| 1m 19s | |
| 2m 39s | |
| 3m 51s | |
| 4m 45s | |
| 3m 49s | |
| 3m 54s | |
| 3m 49s | |
| 6m 45s | |
| 4m 49s | |
| 3m 51s | |
| 5m 7s | |
| 7m 54s | |
| 7s | |
| 0s | |
| 0s | |
| 1h 1m 29s |