testrunner: reduced usage of mutable Settings / some cleanups
#13803
| Job | Run time |
|---|---|
| 2m 38s | |
| 2m 40s | |
| 3m 31s | |
| 7m 26s | |
| 2m 54s | |
| 7m 32s | |
| 55s | |
| 2m 37s | |
| 8m 51s | |
| 43s | |
| 4m 42s | |
| 4m 55s | |
| 4m 53s | |
| 16s | |
| 28s | |
| 34s | |
| 8m 20s | |
| 23s | |
| 39s | |
| 1m 24s | |
| 20m 4s | |
| 1h 26m 25s |