CI: Run tests/v4 separately from whole test suite and disable MacOS and Windows tests
#840
| Job | Run time |
|---|---|
| 1m 0s | |
| 1m 2s | |
| 1m 11s | |
| 1m 3s | |
| 1m 7s | |
| 1m 3s | |
| 1m 6s | |
| 0s | |
| 7m 32s |