Add package name to dependency scanning reports

What does this MR do?

WIP as it depends on changes in dependency scanning project. See https://gitlab.com/gitlab-org/gitlab-ee/issues/8654

EDIT: removing WIP as we're confident about including this change in 11.6.

Extend dependency scanning reports with dependency's package name and use it to generate the location fingerprint.

This MR also extract helper methods to a dedicated module for better isolation and testing.

EDIT: Rewritten using inheritance.

What are the relevant issue numbers?

#8654 (closed) #6718 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• EE specific content should be in the top level /ee folder
• For a paid feature, have we considered GitLab.com plans, how it works for groups, and is there a design for promoting it to users who aren't on the correct plan?
• Security reports checked/validated by reviewer