CI: Run tests/v4 separately from whole test suite and disable MacOS and Windows tests
#839
| Job | Run time |
|---|---|
| 48s | |
| 1m 0s | |
| 58s | |
| 1m 4s | |
| 58s | |
| 1m 2s | |
| 0s | |
| 5m 50s |