trivy feat: add third party flag for os packages

Description

There are cases when package has been installed from package manager (apk/dpkg/rpm), but that package is not vendor package. Add third-party-os-pkgs flag to skip this package and parse files of this package as language packages.

TODO:

[x] support of dpkg
[x] support of apk
[x] support of rpm
[x] update docs

Related issues

Close #4046
Close #4257

Checklist

[x] I've read the guidelines for contributing to this repository.
[x] I've followed the conventions in the PR title.
[x] I've added tests that prove my fix is effective or that my feature works.
[x] I've updated the documentation with the relevant information (if needed).
[ ] I've added usage information (if the PR introduces new options)
[ ] I've included a "before" and "after" example to the description (if the PR is a user interface change).