CORE-4593 make timestamped floating tags the default

[monotek]

Type of Change

• Bugfix
• Enhancement / new feature
• Refactoring
• Documentation

Description

• make timestamped floating tags the default
• as we'll use flux image automation for all our services soon this removes the need to adjust the github actions by hand
• instead dependabot will handle the update for us so we can just use the timestamped images
• old image tags will still be available so this is not breaking anything (i would still give it a major update release)

Checklist

• Write tests
• Make sure all tests pass
• Update documentation
• Review the Contributing Guideline and sign CLA
• [] Reference relevant issue(s) and close them after merging

[ricoberger]

lgtm, maybe the option can also be removed. so it can not be disabled?

[monotek]

lgtm, maybe the option can also be removed. so it can not be disabled?

We could but this is an open source repo so we would create a breaking change.
Therfore i would keep both options.