test_runner: use validateStringArray for timers.enable()
#13021
| Job | Run time |
|---|---|
| 1h 57m 22s | |
| 1h 57m 22s |
timers.enable()
#13021
| Job | Run time |
|---|---|
| 1h 57m 22s | |
| 1h 57m 22s |