fix(cpescan): match if affected version is NA

[kotakanbe]

What did you implement:

		{
			name: "true: NA should match all version",
			uri:  "cpe:/h:fortinet:fortigate-100d:v6.2.9",
			cpe: models.CpeBase{
				URI: "cpe:/h:fortinet:fortigate-100d:-",
			},
			wantIsExactVerMatch:      true,
			wantIsRoughVerMatch:      false,
			wantIsVendorProductMatch: false,
		},

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Checklist:

• 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