Roadmap for moving vz out of experimental

[AkihiroSuda]

• [X] Basic tests #1511
• [x] https://github.com/lima-vm/lima/issues/1611
• [X] https://github.com/lima-vm/lima/issues/1577
• [x] #1333
• [ ] #1609
• [ ] https://github.com/lima-vm/lima/issues/1957 We can also consider making vz default after moving it out of experimental

[ningziwen]

This issue seems also significant although it is hard to reproduce and root cause.