Description of problem:
Currently there's no command to list packages included in specific published content-view version via hammer, `content-view version info` doesn't include that information either.
It would be good to have a separate command (or at least extended `content-view version info` command) which would allow to list the packages, as we can do that via WebUI.

Faced the issue when automating content-view filter tests for CLI - filters and filter rules were successfully created, but there's no way to check that filters actually work as i can't see which packages have made it to content-view version after filtering.

Version-Release number of selected component (if applicable):
Sat6.3 Snap 2

How reproducible:
Always

Steps to Reproduce:
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Actual results:

Expected results:

Additional info: