Bring back default filebeat collector for windows

[mpfz0r]

with https://github.com/Graylog2/graylog2-server/issues/15570

we removed the filebeat collector for Windows. We should check whether that was intended, and if not, re-introduce it.

[tellistone]

Checked with Bernd, this is fixed server-side.

[AntonEbel]

The old Windows Filebeat configuration looks like this:

# Needed for Graylog
fields_under_root: true
fields.collector_node_id: ${sidecar.nodeName}
fields.gl2_source_collector: ${sidecar.nodeId}

output.logstash:
   hosts: ["192.168.1.1:5044"]
path:
  data: ${sidecar.spoolDir!"C:\\Program Files\\Graylog\\sidecar\\cache\\filebeat"}\data
  logs: ${sidecar.spoolDir!"C:\\Program Files\\Graylog\\sidecar"}\logs
tags:
 - windows
filebeat.inputs:
- type: log
  enabled: true
  paths:
    - C:\logs\log.log

which is not very useful in my opinion. @tellistone if we want to have a useful configuration, I think the SecCon team needs to provide one. But I don't know if we can make it to the next bugfix release then. Should I ping someone from the SecCon team or do you want to coordinate this?