Fix sshd_enable_warning_banner_net crash on Debian products

[israel-villar]

The rule had conflicts: sshd_enable_warning_banner active for Debian. Since sshd_enable_warning_banner is not included in Debian data streams, OpenSCAP asserts: xccdf_policy_is_item_selected: Assertion 'false' failed.

Extend the exclusion condition from Ubuntu-only to cover all Debian products.

Description:

• Extend the conflicts: sshd_enable_warning_banner exclusion condition
  from Ubuntu-only to all Debian products in sshd_enable_warning_banner_net/rule.yml.

Rationale:

• The rule had conflicts: sshd_enable_warning_banner active for Debian.
  Since sshd_enable_warning_banner is not included in Debian data streams,
  OpenSCAP asserts: xccdf_policy_is_item_selected: Assertion 'false' failed.

Review Hints:

• One-line change: 'ubuntu' not in product →
  'ubuntu' not in product and 'debian' not in product
• Build and scan to verify: ./build_product debian13 --datastream-only

[openshift-ci]

Hi @israel-villar. Thanks for your PR.

I'm waiting for a ComplianceAsCode member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work.

Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

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