magefile: added combined test coverage support for mage test:all
#8244
| Job | Run time |
|---|---|
| 1m 4s | |
| 1m 20s | |
| 3m 14s | |
| 5m 38s |
mage test:all
#8244
| Job | Run time |
|---|---|
| 1m 4s | |
| 1m 20s | |
| 3m 14s | |
| 5m 38s |