hide_version-config: add version as config/env var

[chriz-active]

• within the grafana-config the version can be hidden
• as a fall back the version can be provided
  • in the config-file
  • as environment variable

Fixes: https://github.com/ysde/grafana-backup-tool/issues/225

[chriz-active]

hi @ysde are you planning to fix the following issue:

Run actions/setup-python@v2
Warning: The support for python 2.7 will be removed on June 19. Related issue: https://github.com/actions/setup-python/issues/672
Version 2.7 was not found in the local cache
Error: Version 2.7 with arch x64 not found
The list of all available versions can be found here: https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json

As far as I understand, your github-actions will not run through with python v2.7 Do you still want to test for python2.7?

[chriz-active]

Note: I messed up our branch and by fixing it, github decided to close the original pull request: https://github.com/ysde/grafana-backup-tool/pull/226

Sorry for that.