Drop python 3.9 and support python 3.13

Due to requirements repo dropped the constraints for
python3.9[1], Tempest needs to drop the python 3.9
support[2]. Because Tempest master cannot support
py3.9 anymore, it needs to be dropped from tempest
plugins also.

Also, add python 3.13 support which is tested as mandatory
in 2026.2 cycle.

[1] https://review.opendev.org/c/openstack/requirements/+/957587
[2] https://review.opendev.org/c/openstack/tempest/+/966101

Co-Authored-By: Ghanshyam Maan <gmaan@ghanshyammann.com>
Change-Id: If684b63c091f8bdfd80116d32a63304daa0605d7
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>
1 file changed