SPECS for new SCA Distribution Independent Linux

[IsExec]

Create SPECS as needed for a new OS SCA.

We would be deleting the sca_unix_audit.yml and sca_distro_independent_linux.yml will be the new generic SCA for Unix.

Issue: wazuh/wazuh#26837
PR - wazuh/wazuh#27749 is ready to merge.
Branch - https://github.com/wazuh/wazuh/tree/enhancement/26837-create-sca-policy-for-Distribution-Independent-Linux

PLEASE confirm with @wazuh/threat-intel before merging.