Need a way to distinguish staging images from production images for timestamp-based tags #761
Description
The tagging pattern used for the images in this repo is the following:
dotnet-buildtools-prereqs-docker/src/ubuntu/manifest.json
Lines 13 to 14 in b85260c
The FloatingTagSuffix variable is only applied to the floating tag. The FloatingTagSuffix variable is what indicates whether the tag is staging or production (it's set to staging if a staging image or (blank) if production). But for the timestamp-based tags, there's no such distinction. So when people do want to use a timestamp based tag, they'll look them up in https://mcr.microsoft.com/v2/dotnet-buildtools/prereqs/tags/list and see a bunch of them listed but there's no way to tell if it's from staging or production.
I think the appropriate thing to do is rename FloatingTagSuffix to something like QualityTagSuffix and apply it to both tag types.