UART: Remove blocking version of read_bytes and rename drain_fifo to read_bytes instead
#4167
| Job | Run time |
|---|---|
| 22s | |
| 21s | |
| 20s | |
| 21s | |
| 20s | |
| 20s | |
| 18s | |
| 20s | |
| 20s | |
| 1s | |
| 3m 3s |