disable the cs collector to get the hostname without using WMI

[davidbrota]

Description

As the exporter runs locally along with the integration, we don't need to fetch the hostname from the exporter. Therefore, we can disable the cs collector, thus avoiding one call to WMI.

I've also removed one of the wait calls, because it was already done in the exporter's run gorutine.

Checklist:

• [x] I checked that Licenses of new dependencies is compliant with our guidelines
• [x] I have performed a self-review of my own code
• [ ] I have added comments in my code to clarify it
• [ ] I have updated the documentation accordingly
• [x] I have added tests that show my fix/feature works

• [x] I cleaned the commit history, and they are following the conventional commits pattern, es:

  type(scope): what I have changed

[davidbrota]

LGTM. Only thing that comes to my mind is possible breakage on upgrade. Do we have any reason to think if os.Hostname() may return a different value than the exporter?

@roobre It should return the same hostname as the exporter. As we are still in beta, we are fine with introducing breaking changes. Another option would be to introduce a setting to keeps backwards compatibility.