Frontend: Show dependency path in the dependency list and vulnerabilities

This issue tracks the frontend work needed to implement #227620 (closed).

Design

See Designs tab. (Designs copied from #198034 (closed) for now.)

Quality

Please update / add unit test as needed

Implementation plan

• Modify Location cell renderer to use dependency path viewer component
  • Pass entire location object to the component
  • Popover should be handled by the component
• Add help icon/popover to Location table header (will be addressed in #247851 (closed) )
  • Where does help link to?
• Adjust column width for the table as per !38570 (comment 391178759) (will be addressed in #247851 (closed) )
• Add specs
• Add feature flag path-to-vulnerable-dependency

Iteration 2 (as discussing at #229472 (comment 409035520)) - TBD

• Rename ancestors to dependency_path
• Rename top_level to direct_dependency
• Update logic to parse dependency_path (may not need)
• Update specs