Update S3 artifact metadata suffix , gardenlinux_epoch and `build_timestamp#314

NotTheEvilOne merged 4 commits into

maingardenlinux/python-gardenlinux-lib:mainfrom

fix/s3-metadata-gl-issue-4294gardenlinux/python-gardenlinux-lib:fix/s3-metadata-gl-issue-4294Copy head branch name to clipboard