MINIFICPP-2678 Move Grafana Loki tests to modular docker tests

[lordgamez]

https://issues.apache.org/jira/browse/MINIFICPP-2678

Depends on github.com//pull/2071

---

Thank you for submitting a contribution to Apache NiFi - MiNiFi C++.

In order to streamline the review of the contribution we ask you
to ensure the following steps have been taken:

For all changes:

• Is there a JIRA ticket associated with this PR? Is it referenced
  in the commit message?

• Does your PR title start with MINIFICPP-XXXX where XXXX is the JIRA number you are trying to resolve? Pay particular attention to the hyphen "-" character.

• Has your PR been rebased against the latest commit within the target branch (typically main)?

• Is your initial contribution a single, squashed commit?

For code changes:

• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE file?
• If applicable, have you updated the NOTICE file?

For documentation related changes:

• Have you ensured that format looks appropriate for the output in which it is rendered?

Note:

Please ensure that once the PR is submitted, you check GitHub Actions CI results for build issues and submit an update to your PR as soon as possible.

[szaszm]

I don't think we can use this, it has no license. It will need to be deleted and reimplemented without looking at the original.

[lordgamez]

You are right, I was not aware of the copyright rules for github gists in case no license is defined, now I see that in this case the gist is copyrighted to the author and cannot be reused without permission. I deleted the files are rewritten them without the original source in 8cf1a6c