[tahoe-lafs-trac-stream] [Tahoe-LAFS] #4143: Refresh docker builder images

[Tahoe-LAFS]

#4143: Refresh docker builder images
--------------------------------+---------------------------
 Reporter:  btlogy              |          Owner:
     Type:  task                |         Status:  new
 Priority:  normal              |      Milestone:  undecided
Component:  dev-infrastructure  |        Version:  n/a
 Keywords:                      |  Launchpad Bug:
--------------------------------+---------------------------
 We have a couple of opened tickets which requires new/updated docker
 images:

 - #4131 needs an update of `oraclelinux-8` to phase out python to 3.8
 (EOL)
 - #4137 needs a new `fedora-41` images to phase out `fedora-35` (EOL)

 I think it also makes sense to prepare new images to start
 building/testing on:

 - `debian-12` before phasing out `debian-11`
 - `ubuntu-24.04` before phasing out `ubuntu-20.04`
 - `oraclelinus-9` before phasing out `oraclelinux-8`

 I propose to PR the addition/update of those new images in the `images`
 workflow first, so we can phase the older ones in the `ci` workflow later.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/4143>
Tahoe-LAFS <https://Tahoe-LAFS.org>
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