magefile: added combined test coverage support for mage test:all
#2152
| Job | Run time |
|---|---|
| 3m 23s | |
| 5m 43s | |
| 9m 6s |
mage test:all
#2152
| Job | Run time |
|---|---|
| 3m 23s | |
| 5m 43s | |
| 9m 6s |