For docker images, produce tags pointing to latest release of a "major" version

[Porkepix]

Use-cases

Instead of needing to fix on a specific release such as 0.12.25, 0.13.3 and so on and having to update this regularly, it would be very interesting to have a latest tag for each of those "major versions", assuming there can be breakages between them and it's not insignificant/trivial change to go from 0.11 to 0.12, from 0.12 to 0.13 and so on.

Proposal

Such tag would be called something like 0.13-latest, 0.14-latest and so on and always point to the most recent of those versions, the same way latest does.

[jansepke]

seems to be a duplicate of #27167

but I would also like to have this tag 👍