Let `-V 'CGA-...'` imply the package name

[luhring]

For commands where the user can specify the vulnerability ID and the distro package name, it would be convenient if they could specify just a CGA ID and let that imply both the vulnerability ID and the distro package name, since CGA IDs are unique across packages.

Commands where this would come into play:

• wolfictl adv create
• wolfictl adv update

This could also benefit wolfictl adv validate, but it doesn't currently have a vulnerability or advisory ID flag.

[iamrajiv]

Hey @luhring, if this is still needed, I can try to do it. I’ve been looking at the codebase and I think this is totally doable. The current flow already detects CGA IDs in reqParams.GenerateRequests() using the regex pattern, so we’re halfway there. But I have some doubts, like what if the CGA ID doesn’t exist yet? (probably fine for create, but should error for update.)