Return API and scanner version in the json output

[demeringo]

Problem

As the underlying Boavizta API may evolve over time, it becomes difficult to compare results of cloud scanner (they may vary depending on the improvements on the API itself).

The same thing may be true for the scanner, if the calclulation method evolves for example.

Solution

The scanner should return some metadata in addition to the values/estimations provided in the json output.

Alternatives

Additional context or elements

Not sure if the API returns it's version or other metadata on a given route.

1. Verify if info exists in a easy to consume way (or maybe implement it) on the API
2. Add it to the output of cloud-scanner

[demeringo]

API version maybe should be picked up directly from the openapi spec.

[demeringo]

Fetch API version directly from the API once Boavizta/boaviztapi#326 and Boavizta/boaviztapi#299 have been released.

Implies to regenerate an API client SDK (which should be done anyway for #576).