CI: Run tests/v4 separately from whole test suite and disable MacOS and Windows tests
#838
| Job | Run time |
|---|---|
| 51s | |
| 1m 0s | |
| 1m 1s | |
| 59s | |
| 1m 0s | |
| 1m 0s | |
| 1s | |
| 5m 52s |