Use SslyzeOutputAsJson without dependencies

[weddige]

The option to validate and import scan results with pydantic/SslyzeOutputAsJson is great. However it requires all the dependencies of sslyze, including nassl. This is a problem, if I'm on a platform where I have to compile it, and only want to read a scan result.

Therefore it would be great, it would be possible to use SslyzeOutputAsJson without dependencies, that are only necessary to perform a scan. That would require some refactoring of the imports.