feat(fetch/redhat): fetch including-unpatched

[MaineK00n]

What did you implement:

Red Hat OVALv2 provides OVALs that contains unpatched definitions.
This PR supports those OVAL.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

before

$ goval-dictionary fetch redhat 8
$ goval-dictionary select --by-package redhat 8 "vim-common" | grep "oval:com.redhat.cve:def"
$

after

$ goval-dictionary fetch redhat 8
$ goval-dictionary select --by-package redhat 8 "vim-common" | grep "oval:com.redhat.cve:def"
    DefinitionID: "oval:com.redhat.cve:def:20222819",
    ...
$

Checklist:

You don't have to satisfy all of the following.

• Write tests
• Write documentation
• Check that there aren't other open pull requests for the same issue/feature
• Format your source code by make fmt
• Pass the test by make test
• Provide verification config / commands
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES

Reference

[shino]

Perfect!