Fix broken dependency list for invalid Container Scanning pkg mgr type

What does this MR do and why?

Backport !128385 (merged) into 16.2.

Fix broken dependency list for invalid Container Scanning pkg mgr type

See Fix broken dependency list for invalid Containe... (!128385 - merged)

What are the relevant issue numbers?

• Dependency list page throws error if Container ... (#420664 - closed)
• [License/Dependeny Scanning] Error fetching the... (#421027 - closed)

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.