Build distributed sshd config checks for RHCOS4

With RHEL9 nodes, RHCOS4 has support for drop-in files in sshd_config.d
directory.

Author: yuumasato

products/rhcos4/product.yml

@@ -18,6 +18,8 @@ groups:
   dedicated_ssh_keyowner:
     name: ssh_keys
 
+sshd_distributed_config: "true"
+
 cpes_root: "../../shared/applicability"
 cpes:
   - rhcos4:

tests/data/product_stability/rhcos4.yml

@@ -89,7 +89,7 @@ reference_uris:
   stigref: https://www.cyber.mil/stigs/srg-stig-tools/
 release_key_fingerprint: 567E347AD0044ADE55BA8A5F199E2F91FD431D51
 rsyslog_cafile: /etc/pki/tls/cert.pem
-sshd_distributed_config: 'false'
+sshd_distributed_config: 'true'
 sysctl_remediate_drop_in_file: 'false'
 type: platform
 uid_min: 1000