enhancement: Add ability to disable exporter metrics itself

[ritmas]

Add ability to disable exporter metrics itself which is a long-lasting feature of node_exporter (source code):

$ docker run -it quay.io/prometheus/node-exporter:latest --help | grep 'web.disable' -A1
      --[no-]web.disable-exporter-metrics  
                                 Exclude metrics about the exporter itself (promhttp_*, process_*, go_*).

[github-actions]

Docs Build 📝

Thank you for contribution!✨

This PR has been merged and the docs are now incorporated into main:
https://prometheus-community.github.io/ansible/branch/main

[ritmas]

@SuperQ when this PR can be merged? Is something missing?

[SuperQ]

Sorry, I'm working on an issue with the changelog generator. I'm trying to avoid corrupting the changelog more.