Detect go binary packages

[pombredanne]

This PR add support to scan Go binaries for their embedded packages. This is the ScanCode side.

The Go inspector PR is at

• Detect go packages go-inspector#15 and need to be merged first and released for things to work

Tasks

• Reviewed contribution guidelines
• PR is descriptively titled 📑 and links the original issue above 🔗
• Tests pass -- look for a green checkbox ✔️ a few minutes after opening your PR
  Run tests locally to check for errors.
• Commits are in uniquely-named feature branch and has no merge conflicts 📁
• Updated documentation pages (if applicable)
• Updated CHANGELOG.rst (if applicable)

[pombredanne]

@AyanSinhaMahapatra ready for your review

[AyanSinhaMahapatra]

LGTM! Thanks @pombredanne
Can be merged with a minor nit resolved.

[AyanSinhaMahapatra]

I'm getting a:

INFO: pip is looking at multiple versions of scancode-toolkit[packages,testing] to determine which version is compatible with other requirements. This could take a while.
ERROR: Cannot install scancode-toolkit[packages,testing]==32.2.1 because these package versions have conflicting dependencies.

The conflict is caused by:
    scancode-toolkit[packages,testing] 32.2.1 depends on go-inspector>0.3.0; platform_system == "Linux" and extra == "packages"
    The user requested (constraint) go-inspector==0.3.0

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts

On running ./configure --clean && ./configure --dev not sure why this is not happening in the CI 🤔

Edit: seems to be a fluke, not happening anymore

[AyanSinhaMahapatra]

I think https://github.com/aboutcode-org/go-inspector/blob/main/src/go_inspector/binary.py#L482 should be in packagedcode here? Or do we need #3761 to be merged before that?

[AyanSinhaMahapatra]

Thanks @pombredanne , merging!