Add support for security policies

[imobachgs]

Related to yast/yast-security#128.

• Add support to check security policies in AutoYaST.
• If displays a Y2Issue for each failing rule with :warn severity.

Enabling a policy

  <security>
    <security_policy>
      <action>remediate</action> <!-- none, remediate or scan -->
      <policy>stig</policy>
    </security_policy>
  </security>

Screenshots

[joseivanlopez]

Version and changlog are missing.

[joseivanlopez]

LGTM

[ancorgs]

Re-validating the approval from @joseivanlopez now that the related changes are merged

[yast-bot]

✔️ Internal Jenkins job #9 successfully finished
✔️ Created IBS submit request #283925