Relax Send and Unpin requirements for futures spawned using run_future_in_dedicated_thread
#3133
| Job | Run time |
|---|---|
| 48s | |
| 16m 39s | |
| 4m 51s | |
| 22m 20s | |
| 6m 33s | |
| 26m 13s | |
| 8m 26s | |
| 17m 57s | |
| 1h 43m 47s |