molecule reset should trigger vagrant prune

`molecule reset` command resets molecule but if driver is installed, it should also trigger its own cleaning commands, like running at least:
```
vagrant global-status --prune
```

Implementing this feature may need changes to molecule in order to define driver entry point for reset command.

Start with the molecule reset command and the driver entry-point behavior described in the issue. Check how driver-specific cleaning commands are currently invoked, then verify that reset triggers at least `vagrant global-status --prune` when the driver is installed. Done means the reset flow supports the driver cleanup without affecting drivers that do not provide it.

Written by the indexing model from the issue text.