This commit modifies the python job templates:
* adds py312 job to stable/2025.1 (latest supported python version in
2025.1 Epoxy)
* adds py39 job to stable/2025.1 (oldest supported python version in
2025.1 Epoxy)
(Note: when all projects have branched their repositories for
stable/2025.1, then the master branch will be considered as the
future branch of 2025.2 Flamingo, so based on the runtimes, master
branch should be dropped from py39 jobs and added to py310 jobs in
the template as the new oldest supported python version)
Change-Id: I3d036d0add1cd0486aaee9ed794b8231e3d3ea10
17ab66cc35