It was removed from tested runtimes in 2025.2 . It has been kept for
one cycle for smooth transition of the other projects, but it's time
to bump the enforced minimum requirement.
Also add Python 3.13 which has been tested for some time.
Change-Id: Id2fc69998a59abb16a6c07b4077b32179802b172
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>