add localfile labels to agent ossec.conf template

[dragospe]

This change enables generating a stanza such as

<localfile>
  <location>/var/log/myapp/log.json</location>
  <log_format>json</log_format>
  <label key="@source">myapp</label>
  <label key="agent.type">webserver</label>
</localfile>

from the wazuh_agent_config snippet:

                - format: json
                  location: /var/log/myapp/log.json
                  label:
                    - key: "@source"
                      value: "myapp"    
                    - key: "agent.type"
                      value: "webserver"

[neonmei]

Hi @dragospe, changes looks good! 👍
Thanks for your contributions!